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- Detailed Information

# Viraht Sahni

Professor

Physics

**Location:** 1407a Ingersoll Hall

**Phone:** 718.951.5000 x2866

**Fax:** 718.951.4407

**Email:**

Viraht Sahni has been Broeklundian Professor at Brooklyn College since Feb. 1, 2001, and taught at both the college and the CUNY Graduate Center in various roles, from instructor to professor, from Feb. 1, 1973 to Jan. 1, 1982. Sahni has also been instructor of electrical engineering at Pratt Institute (Sept. 1, 1968-June 30, 1970) and visiting research physicist at the Kavli Institute of Theoretical Physics, University of California, Santa Barbara (Jan. 15-Aug. 15, 1983).

### Education:

Ph.D., Polytechnic Institute of Brooklyn - 1972 *(Theoretical Physics)*

M.S., Polytechnic Institute of Brooklyn - 1968 *(Electrical Engineering)*

B.Tech. (honors), Indian Institute of Technology, Bombay, India - 1965 *(Electrical Engineering)*

### Areas of Expertise:

Theoretical electronic structure of matter: atoms, molecules, solids and solid surfaces. The research is within the context of Schroedinger theory, traditional density functional theory and quantal density functional theory (QDFT). Sahni's two books on QDFT are *Quantal Density Functional Theory* (Berlin: Springer, 2004) and *Quantal Density Functional Theory II: Approximation Methods and Applications* (Berlin: Springer, 2009).

### Books and Publications

V. Sahni, "Perspectives on Determinism in Quantum Mechanics: Born, Bohm, and the "Quantal Newtonian" Laws", J. Chem. Phys. 157, 244106 (2023); doi.org/10.1063/5.0130945 *(Books and Publications: Article (Peer-reviewed))* 2023

M. Slamet, V. Sahni, "Wave function identity: A new symmetry for 2-electron systems in an electromagnetic field",Chemical Physics 556 (2022) 111453 https://doi.org/10.1016/j.chemphys.2022.111453 *(Books and Publications: Article (Peer-reviewed))* 2022

V. Sahni, "Schroedinger Theory of Electrons: Complementary Perspectives" (Springer Tracts on Modern Physics 285) Springer Nature Switzerland AG 2022. *(Books and Publications: Book (Authored))* 2022

V. Sahni, "The 'Quantal Newtonian' First Law: A Complementary Perspective to the Stationary-state Quantum Theory of Electrons", ChemPhysChem/23, Issue 18/e202200433

https://doi.org/10.1002/cphc.202200433

Cover Featured Article *(Books and Publications: Article (Peer-reviewed))* 2022

M. Slamet and V. Sahni, " Triplet 2^3 S State of a Quantum Dot in a Magnetic Field: A 'Quantal Newtonian' First Law Study", Chemical Physics 546 (2021) 111073. https://doi.org/10.1016/j.chemphys.2020.111073 *(Books and Publications: Article (Peer-reviewed))* 2021

V. Sahni, "Schroedinger-Pauli Theory of Electrons: New Perspectives", Int J Quantum Chem. 2021;121:e26556

https://doi.org/10.1002/qua.26556 *(Books and Publications: Article (Peer-reviewed))* 2021

M. Slamet and V. Sahni, "Kinetic effects in 2D and 3D quantum dots: Comparison between high and low electron correlation regimes", Computational and Theoretical Chemistry, 1138, 140-157 (2018);doi.org/10.1016/jcomptc.2018.06.001 *(Books and Publications: Article (Peer-reviewed))* 2018

Marlina Slamet and Viraht Sahni, "Study of the kinetic energy densities of electrons as applied to quantum dots in a magnetic field", International Journal of Quantum Chemistry. 2018;e25818

https://doi.org/10.1002/qua.25818 *(Books and Publications: Article (Peer-reviewed))* 2018

V. Sahni, "Generalization of the Schroedinger theory of electrons", Journal of Computational Chemistry, 39, 1083-1089 (2018); doi:10.1002/jcc.24888 *(Books and Publications: Article (Peer-reviewed))* 2018

X.-Y. Pan and V. Sahni, "Dissipation Effects in Schroedinger and Quantal Density Functional Theories in an Electromagnetic Field ", Computation 6, 25 (2018);doi:10.3390/computation6010025 *(Books and Publications: Article (Peer-reviewed))* 2018

M. Slamet and V. Sahni, "Electron Correlations in an Excited State of a Quantum Dot in a Uniform Magnetic Field", Computational and Theoretical Chemistry 1114, 125 (2017). *(Books and Publications: Article (Peer-reviewed))* 2017

V. Sahni and X.-Y. Pan, "Schroedinger Theory of Electrons in Electromagnetic Fields: New Perspectives",

Computation 5, 15 (2017); doi:10.3390/computation5010015

Special Issue on Advances in Electronic Structure Theory: Method Development and Application. *(Books and Publications: Article (Peer-reviewed))* 2017

V. Sahni and X.-Y. Pan, Properties of Schroedinger Theory of Electrons in Electromagnetic Fields,

http://arxiv.org/abs/1611.07015 *(Books and Publications: Article (Other))* 2016

V. Sahni, Quantal Density Functional Theory, 2nd Edition, Springer-Verlag, Berlin/Heidelberg 2016.

This book is on quantal density functional theory (QDFT) which is a time-dependent local effective potential theory of the electronic structure of matter, both natural and 'artificial'. The time-independent QDFT constitutes a special case. The 2nd edition describes the further development of the theory, and extends it to include the presence of an external magnetostatic field. *(Books and Publications: Book (Authored))* 2016

V. Sahni, X.-Y. Pan, and T. Yang, Electron Correlations in Local Effective Potential Theory,

Computation 4, 30 (2016); doi:10.3390/computation4030030

(Invited paper to commemorate the 50th anniversary of Kohn-Sham theory.)

*(Books and Publications: Article (Peer-reviewed))* 2016

Pan, Xiao-Yin and Sahni, Viraht, Hohenberg-Kohn Theorems in Electrostatic and Uniform Magnetostatic Fields, Journal of Chemical Physics 143, 174105 (2015) *(Books and Publications: Article (Peer-reviewed))* 2015

Achan, D., L. Massa and V. Sahni. "Wigner High Electron Correlation Regime in Nonuniform Electron Density Systems: Kinetic and Correlation-Kinetic Aspects." *Computational and Theoretical Chemistry* 1035: 14. *(Books and Publications: Article (Peer-reviewed))* 2014

Achan, D., L. Massa and V. Sahni. "Wigner High Electron Correlation Regime of Nonuniform Density Systems: A Quantal Density Functional Theory Study." *Physical Review A* 90: 022502. *(Books and Publications: Article (Peer-reviewed))* 2014

Pan, X.-Y. and V. Sahni. "Comment on Density and Physical Current Density Function Theory." *International Journal of Quantum Chemistry* 114: 233; Letter to the Editor. *(Books and Publications: Article (Peer-reviewed))* 2014

Zhu, H.-M, J.-W Chen., X.-Y. Pan and V. Sahni. "Wave Function for Harmonically Confined Electrons in Time-dependent Electric and Magnetostatic Fields." *Journal of Chemical Physics* 140: 024318. *(Books and Publications: Article (Peer-reviewed))* 2014

Li, Y.-Q., X.-Y. Pan and V. Sahni. "Wave Function for Time-dependent Harmonically Confined Electrons in a Time-dependent Electric Field." *Journal of Chemical Physics* 139: 114301. *(Books and Publications: Article (Peer-reviewed))* 2013

Pan, X.-Y. and V. Sahni. "Comment on 'Density and Physical Current Density Functional Theory', doi: 10.1002/qua. 22862 (2010)." *International Journal of Quantum Chemistry* DOI: 10.1002/qua. 24532. *(Books and Publications: Article (Peer-reviewed))* 2013

Pan, X.-Y. and V. Sahni. "Reply to the Comment by Vignale et al." *International Journal of Quantum Chemistry* 113: 1424.

*(Books and Publications: Article (Peer-reviewed))* 2013

Li, Y.-Q., X.-Y. Pan, B. Li and V. Sahni. "Demonstration of the Gunnarsson-Lundqvist Theorem and the Multiplicity of Potentials for Excited States." *Physical Review A* 85: 032517. *(Books and Publications: Article (Peer-reviewed))* 2012

Pan, X.-Y. and V. Sahni. "Generalization of the Hohenberg-Kohn Theorem to the Presence of a Magnetostatic Field." *Journal of Physics and Chemistry of Solids* 73: 630. *(Books and Publications: Article (Peer-reviewed))* 2012

Pan, X.-Y. and V. Sahni. "Hohenberg-Kohn Theorem including Electron Spin." *Physical Review A* 86: 042502. *(Books and Publications: Article (Peer-reviewed))* 2012

Pan, X.-Y. and V. Sahni. "Hohenberg-Kohn, Kohn-Sham, and Quantal Density Functional Theories in the Presence of a Magnetostatic Field." *Theoretical and Computational Developments in Modern Density Functional Theory.* Ed. A.K. Roy. New York: Nova Science Publishers. *(Books and Publications: Book Chapter)* 2012

Pan, X.-Y. and V. Sahni. "Reply to the Comment by Vignale et al." *International Journal of Quantum Chemistry.* DOI: 10.1002/qua.24326. *(Books and Publications: Article (Peer-reviewed))* 2012

Sahni, V. and X.-Y. Pan. "Hohenberg-Kohn and Percus-Levy-Lieb Proofs of Density-Functional Theory." *Physical Review A* 85: 052502. *(Books and Publications: Article (Peer-reviewed))* 2012

Sahni, V. and X.-Y. Pan. "On the Hohenberg-Kohn and Levy-Lieb Constrained Search Proofs of Density Functional Theory." *Bulletin of the American Physical Society* 57: 486. *(Books and Publications: Article (Peer-reviewed))* 2012

X.-Y. Pan, Y.-Q. Li, B. Li and V. Sahni. "Demonstration of the Gunnarsson-Lundqvist Theorem and Lack of Hohenberg-Kohn Theorem for Excited States." *Bulletin of the American Physical Society* 57: 595. *(Books and Publications: Article (Peer-reviewed))* 2012

M. Slamet, X.-Y. Pan and V. Sahni. "Wave Function Functionals for the Density." *Physical Review A* 84: 052504. *(Books and Publications: Article (Peer-reviewed))* 2011

Pan, X-.Y. and V. Sahni. "Quantal Density Functional Theory in the Presence of a Magnetic Field." *Physical Review A 83* 042518. *(Books and Publications: Article (Peer-reviewed))* 2011

Pan, X.-Y., V. Sahni, L. Massa and K.D. Sen. "New Expression for the Expectation Value Integral for a Confined Helium Atom." *Computational and Theoretical Chemistry* 965: 202. *(Books and Publications: Article (Peer-reviewed))* 2011

Pan, X.-Y. and V. Sahni. "Density and Physical Current Density Functional Theory." *International Journal of Quantum Chemistry* 110: 2833. *(Books and Publications: Article (Peer-reviewed))* 2010

Pan, X.-Y. and V. Sahni. "Particle Number and Probability Density Functional Theory and A-Representability." *Journal of Chemical Physics* 132: 16 4116. *(Books and Publications: Forthcoming Publications)* 2010

Pan, X.-Y., M. Slamet and V. Sahni. "Wave Function Functionals." *Physical Review A* 81: 042524. *(Books and Publications: Forthcoming Publications)* 2010

Sahni, V. and X.-Y. Pan. "Particle Number and Probability Density Functional Theory and A-Representability." *Bulletin of the American Physical Society* 55: 450. *(Books and Publications: Article (Other))* 2010

"Quantal Density Functional Theory: Beyond Hohenberg-Kohn-Sham Theory." *Proceedings of the 26th International Colloquium on Group Theoretical Methods in Physics.* Eds. by J.L. Birman, S. Catto and B. Nicolescu. Canopus Publishers. 452-64. *(Books and Publications: Article (Peer-reviewed))* 2009

*Quantal Density Functional Theory II: Approximation Methods and Applications.* Springer-Verlag. The volume details applications of quantal density functional theory (QDFT) to atoms, molecules, the anion-positron complex, and the metal-vacuum interface. Various approximation methods within QDFT based on electron correlations as well as Many-body and Moller-Plesset perturbation theory are described. *(Books and Publications: Book (Authored))* 2009

Pan, X.-Y. and V. Sahni. "Correlation-Kinetic Contributions in the Mapping to Model Noninteracting Fermion and Boson Systems." *Bulletin of the American Physical Society* 54: 313. *(Books and Publications: Article (Other))* 2009

Pan, X.-Y. and V. Sahni. "Quantal Density Functional Theory of the Density Amplitude: Application to Atoms." *Physical Review A* 80: 022506. *(Books and Publications: Article (Peer-reviewed))* 2009

Sahni, V. and X.-Y. Pan. "Basic Variables in Density Functional Theory in the Presence of a Magnetic Field." *Bulletin of the American Physical Society* 54: 529. *(Books and Publications: Article (Other))* 2009

Pan, X.-Y. and V. Sahni. "New Perspectives on the Fundamental Theorem of Density Functional Theory." *International Journal of Quantum Chemistry* 108: 2756. *(Books and Publications: Article (Peer-reviewed))* 2008

Sahni, V. and X.-Y. Pan. "New Perspectives on the Fundamental Theorem of Density Functional Theory." *Bulletin of the American Physical Society* 53: 308. *(Books and Publications: Article (Other))* 2008

Slamet, M., X.-Y. Pan and V. Sahni. "Construction of Wave Function Functionals." *Bulletin of the American Physical Society* 53: 276. *(Books and Publications: Article (Other))* 2008

Pan, X.-Y., V. Sahni and L. Masa. "Normalization and Fermi-Coulomb and Coulomb Hole Sum Rules for Approximate Wave Functions." *International Journal of Quantum Chemistry* 107: 816. *(Books and Publications: Article (Peer-reviewed))* 2007

Pan, X.-Y., V. Sahni and L. Massa. "Wave Function Functional via the Normalization Constraint." *Bulletin of the American Physical Society* 52: H21.00003. *(Books and Publications: Article (Other))* 2007

Qian, Z. and V. Sahni. "Asymptotic Near-Nucleus Structure of the Electron-Interaction Potential in Local Effective Potential Theories." *Physical Review A* 75: 032517. *(Books and Publications: Article (Peer-reviewed))* 2007

Sahni, V. and Z. Qian. "Asymptotic Near Nucleus Structure of the Electron-Interaction Potential in Local Effective Potential Theories." *Bulletin of the American Physical Society* 52: H21.00007. *(Books and Publications: Article (Other))* 2007

Sahni, V., M. Slamet and X.-Y. Pan. "Local Effective Potential Theory: Non-uniqueness of Potential and Wave Function." *Journal of Chemical Physics* 126: 204106. *(Books and Publications: Article (Peer-reviewed))* 2007

Slamet, M., X.-Y. Pan and V. Sahni. "Wave Function Functionals via the Constraint of the Expectations of Hermitian Single-Particle Operators." *Bulletin of the American Physical Society* 52: H21.00002. *(Books and Publications: Article (Other))* 2007

Pan, X.-Y., V. Sahni and L. Massa. "Determination of a Wave Function Functional: The Constrained-Search―Variational Method." *Philosophical Magazine* 86: 2673. *(Books and Publications: Article (Peer-reviewed))* 2006

Pan, X.-Y., V. Sahni and L. Massa. "Fundamental Importance of the Coulomb Hole Sum Rule to Understanding of the Colle-Salvetti Wave Function Functional." *Journal of Chemical Physics* 125: 034103. *(Books and Publications: Article (Peer-reviewed))* 2006

Sahni, V. and M. Slamet. "Quantal Density Functional Theory: Wave Function Arbitrariness of the Noninteractng Fermion Model." *International Journal of Quantum Chemistry* 106: 3087. *(Books and Publications: Article (Peer-reviewed))* 2006

Sahni, V., X.-Y. Pan and L. Massa. "One-to One Correspondence of the Normalization and Coulomb Hole Sum Rules for Approximate Wave Functions." *Bulletin of the American Physical Society* 51: 661. *(Books and Publications: Article (Other))* 2006

Sahni, V., X.-Y. Pan and M. Slamet. "Non-Uniqueness of Local Effective Potential Energy in Density Functional Theory." *Bulletin of the American Physical Society* 51: 660. *(Books and Publications: Article (Other))* 2006

Slamet, M. and V. Sahni. "Wave Function Arbitrariness of Noninteracting Fermion Model in Quantal Density Functional Theory (QDFT)." *Bulletin of the American Physical Society* 51: 661. *(Books and Publications: Article (Other))* 2006

Pan, X.-Y., V. Sahni and L. Massa. "Determination of Wave Function Functionals: The Constrained Search -- Variational Method." *Physical Review A* 72: 032505. *(Books and Publications: Article (Peer-reviewed))* 2005

Pan, X.-Y., V. Sahni and L. Massa. "Integration Domain of Hylleraas Coordinates." E-print: physics/0310128. *(Books and Publications: Article (Peer-reviewed))* 2005

Qian, Z. and V. Sahni. "Exact Electronic Properties in the Classically Forbidden Region of a Metal Surface." *International Journal of Quantum Chemistry* 104: 929. *(Books and Publications: Article (Peer-reviewed))* 2005

"On Ehrenfest's Theorem." *Internation Journal of Quantum Chemistry* 97: 953. *(Books and Publications: Article (Peer-reviewed))* 2004

*Quantal Density Functional Theory.* Berlin and Heidelberg, Germany: Springer-Verlag. The book, aimed at advanced undergraduate students, graduate students and researchers in the field, encompasses the critical ideas developed in my research over the past two decades. The book describes a new theory of electronic structure incorporating both time-dependent and time-independent phenomenon. It further provides an entirely new perspective on both time-dependent and time-independent Schrödinger and Hohenberg-Kohn-Sham Density Functional Theories. *(Books and Publications: Book (Authored))* 2004

Pan, X.-Y. and V. Sahni. "Coalescence Constraints of Many-Body Systems in One Dimension." E-print: cond-mat/0309231. *(Books and Publications: Article (Peer-reviewed))* 2004

Pan, X.-Y. and V. Sahni. "Quantal Density Functional Theory of the Hydrogen Molecule." *Journal of Chemical Physics* 120: 5642. *(Books and Publications: Article (Peer-reviewed))* 2004

Pan, X.-Y., V. Sahni and L. Massa. "Determination of a Wave Function Functional." *Physical Review Letters* 93: 130401. *(Books and Publications: Article (Peer-reviewed))* 2004

Pan, X.-Y., V. Sahni and L. Massa. "The Constrained-Search -- Variational Method: Application to the Ground State of the Helium Atom." *Bulletin of the American Physical Society* 49: 433. *(Books and Publications: Article (Other))* 2004

Sahni, V. and M. Slamet. "State Arbitrariness of the Noninteracting Fermion Model in Quantal Density Functional Theory." *International Journal of Quantum Chemistry* 100: 858. *(Books and Publications: Article (Peer-reviewed))* 2004

Sahni, V., X.-Y. Pan and L. Massa. "Determination of a Wave Function Functional: The Constrained Search Variational Method." *Bulletin of the American Physical Society* 49: 432. *(Books and Publications: Article (Other))* 2004

Slamet, M. and V. Sahni. "The State Arbitrariness of the Model Noninteracting Fermion System in Quantal Density Functional Theory (QDFT)." *Bulletin of the American Physical Society* 49: 433. *(Books and Publications: Article (Other))* 2004

"Quantal Density Functional Theory." *Electron Correlations and Materials Properties 2.* Eds. A. Gonis, N. Kioussis and M. Cifton. New York: Kluwer Academic/Plenum Publishers. *(Books and Publications: Book Chapter)* 2003

"Quantal Density Functional Theory." *Electron Correlations and Materials Properties 2* Eds. Gonis et al. Kluwer Academic/Plenum Publishers. *(Books and Publications: Article (Peer-reviewed))* 2003

Pan, X.-Y. and V. Sahni. "Corollary to the Hohenberg-Kohn Theorem." *International Journal of Quantum Chemistry* 95: 387. *(Books and Publications: Article (Peer-reviewed))* 2003

Pan, X.-Y. and V. Sahni. "Criticality of the Electron-Nucleus Cusp Condition to Local Effective Potential-Energy Theories." *Physical Review A* 67: 012501. *(Books and Publications: Article (Peer-reviewed))* 2003

Pan, X.-Y. and V. Sahni. "Integral Coalescence Conditions in D2, Dimension Space." *Journal of Chemical Physics* 119: 7083. *(Books and Publications: Article (Peer-reviewed))* 2003

Pan, X.-Y. and V. Sahni. "Quantal Density Functional Theory (Q-DFT) of the Density Amplitude." *Bulletin of the American Physical Society* 48: 1024. *(Books and Publications: Article (Other))* 2003

Sahni, V. and X.-Y. Pan. "Corollary to the Hohenberg-Kohn Theorem." *Bulletin of the American Physical Society* 48: 1025. *(Books and Publications: Article (Other))* 2003

Sahni, V. and X.-Y. Pan. "Quantal Density Functional Theory of Degenerate States." *Physical Review Letters* 90: 123001. *(Books and Publications: Article (Peer-reviewed))* 2003

Slamet, M., R. Singh and V. Sahni. "Quantal Density Functional Theory (Q-DFT) of Excited States: The State Arbitrariness of the Model Noninteracting System." *Bulletin of the American Physical Society* 48: 1024. *(Books and Publications: Article (Other))* 2003

Slamet, M., R. Singh, L. Massa and V. Sahni. "Quantal Density-Functional Theory of Excited States: The State Arbitrariness of the Model Noninteracting System." *Physical Review A* 68: 042504. *(Books and Publications: Article (Peer-reviewed))* 2003

Pan, X.-Y. and V. Sahni. "Quantal Density Functional Theory (Q-DFT) Applied to the Hydrogen Molecule." *Bulletin of the American Physical Society* 47: 1215. *(Books and Publications: Article (Other))* 2002

Qian, Z. and V. Sahni. "Analytical Asymptotic Structure of the Kohn-Sham Exchange-Correlation Potential at a Metal Surface." *Bulletin of the American Physical Society* 47: 1214. *(Books and Publications: Article (Other))* 2002

Qian, Z. and V. Sahni. "Quantum Mechanical Image Potential Theory." *Physical Review B* 66: 205103. *(Books and Publications: Article (Peer-reviewed))* 2002

Sahni, V. and X.-Y. Pan. "Quantal Density Functional Theory (Q-DFT) of Degenerate Ground and Excited States." *Bulletin of the American Physical Society* 47: 1214. *(Books and Publications: Article (Other))* 2002

Qian, Z. and V. Sahni. "Sum Rules and Properties in Time-Dependent Density Functional Theory." *Bulletin of the American Physical Society* 46: 508. *(Books and Publications: Article (Other))* 2001

Qian, Z. and V. Sahni. "Sum Rules and Properties in Time-Dependent Density Functional Theory." *Physical Review A* 63: 042508. *(Books and Publications: Article (Peer-reviewed))* 2001

Sahni, V., L. Massa, R. Singh and M. Slamet. "Quantal Density Functional Theory of Excited States." *Bulletin of the American Physical Society* 46: 508. *(Books and Publications: Article (Other))* 2001

Sahni, V., L. Massa, R. Singh and M. Slamet. "Quantal Density Functional Theory of Excited States." *Physical Review Letters* 87: 113002. *(Books and Publications: Article (Peer-reviewed))* 2001

Sahni, V., Z. Qian and K.D. Sen. "Atomic Shell Structure in Hartree Theory." *Journal of Chemical Physics* 114: 8784. *(Books and Publications: Article (Peer-reviewed))* 2001

Slamet, M. and V. Sahni. "Application of Excited State Quantal Density Functional Theory to an Exactly Solvable Model." *Bulletin of the American Physical Society* 46: 508. *(Books and Publications: Article (Other))* 2001

Slamet, M. and V. Sahni. "Quantal Density Functional Theory of Excited States: Application to an Exactly Solvable Model." *International Journal of Quantum Chemistry* 85: 436. *(Books and Publications: Article (Peer-reviewed))* 2001

"Schrödinger Theory From the Perspective of Classical Fields Derived From Quantal Sources." *Journal of Molecular Structure (Theochem)* 501: 91. *(Books and Publications: Article (Peer-reviewed))* 2000

Qian, Z. and V. Sahni. "Analytical Properties of the Kohn-Sham Theory Exchange and Correlation Energy and Potential via Quantal Density Functional Theory." *International Journal of Quantum Chemistry* 80: 555. *(Books and Publications: Article (Peer-reviewed))* 2000

Qian, Z. and V. Sahni. "Correlation-Kinetic Effects-Physical Origin of the Derivative Discontinuity of Kohn-Sham Theory Electron-Interaction Potential." *Bulletin of the American Physical Society.* 45: 73. *(Books and Publications: Article (Other))* 2000

Qian, Z. and V. Sahni. "Origin of the Derivative Discontinuity in Density Functional Theory." *Physical Review B* 62: 16364. *(Books and Publications: Article (Peer-reviewed))* 2000

Qian, Z. and V. Sahni. "Proof of Finiteness of Kohn-Sham Theory Electron-Interaction Potential at the Nucleus of Atoms." *International Journal of Quantum Chemistry* 79: 205. *(Books and Publications: Article (Peer-reviewed))* 2000

Qian, Z. and V. Sahni. "Time-Dependent Differential Virial Theorems." *International Journal of Quantum Chemistry* 78: 341. *(Books and Publications: Article (Peer-reviewed))* 2000

"Quantal Density-Functional Theory." Invited paper at the Centennial Meeting of the American Physical Society, Atlanta. *Bulletin of the American Physical Society* 44: 1902. *(Books and Publications: Article (Other))* 1999

Qian, Z. and V. Sahni. "A New Many-Body Perturbative Theoretic Approach to Electronic Structure." *Bulletin of the American Physical Society* 44: 1903. *(Books and Publications: Article (Other))* 1999

Sahni, V. and M. Slamet. "Electron Correlations in Kohn-Sham Exchange-Only Theory." *International Journal of Quantum Chemistry* 71: 473. *(Books and Publications: Article (Peer-reviewed))* 1999

Sahni, V. and Z. Qian. "Analytical Properties of Kohn-Sham Theory Correlation Energy and Potential via Quantal Density-Functional Theory." *Bulletin of the American Physical Society* 44: 1903. *(Books and Publications: Article (Other))* 1999

Singh, R., L. Massa and V. Sahni. "Critical Analysis of the Colle-Salvetti Wavefunction Functional of the Density." *Physical Review A* 60: 4135. *(Books and Publications: Article (Peer-reviewed))* 1999

Singh, R., L. Massa and V. Sahni. "Quantal Density-Functional Theory: Application to the He Atom." *Bulletin of the American Physical Society* 44: 1903. *(Books and Publications: Article (Other))* 1999

Qian, Z. and V. Sahni. "Analytical Asymptotic Structure of the Correlation-Kinetic Component of the Kohn-Sham Exchange-Correlation Potential in Atoms." *Physical Review A* 57: 4041. *(Books and Publications: Article (Peer-reviewed))* 1998

Qian, Z. and V. Sahni. "Analytical Asymptotic Structure of the Pauli, Coulomb and Correlation-Kinetic Components of the Kohn-Sham Theory Exchange-Correlation Potential in Atoms." *International Journal of Quantum Chemistry* 70: 671. *(Books and Publications: Article (Peer-reviewed))* 1998

Qian, Z. and V. Sahni. "Physical Origin of Discontinuity of Kohn-Sham Theory Effective Potential." *Bulletin of the American Physical Society* 43: 201. *(Books and Publications: Article (Other))* 1998

Qian, Z. and V. Sahni. "Physical Origin of Discontinuity of Kohn-Sham Theory Effective Potential." *Physics Letters A* 248: 393. *(Books and Publications: Article (Peer-reviewed))* 1998

Qian, Z. and V. Sahni. "Physics of Transformation from Schrödinger Theory to Kohn-Sham Density-Functional Theory: Application to an Exactly Solvable Model." *Physical Review A* 57: 2527. *(Books and Publications: Article (Peer-reviewed))* 1998

Qian, Z. and V. Sahni. "Quantum-Mechanical Interpretation of Time-Dependent Density-Functional Theory." *Bulletin of the American Physical Society* 43: 200. *(Books and Publications: Article (Other))* 1998

Qian, Z. and V. Sahni. "Quantum-Mechanical Interpretation of Time-Dependent Density-Functional Theory." *Physics Letters A* 247: 303. *(Books and Publications: Article (Peer-reviewed))* 1998

Sahni, V. and A. Solomatin. "Recent Developments in the Electronic Structure of Metal Surfaces." *Advances in Quantum Chemistry, Density-Functional Theory, Volume 33.* Ed. J.M. Seminario. Academic Press. 241. *(Books and Publications: Article (Peer-reviewed))* 1998

Sahni, V. and A. Solomatin. "Recent Developments in the Electronic Structure of Metal Surfaces." *Density Functional Theory, Advances in Quantum Chemistry, Volume 33.* Ed. J. Seminario. Academic Press. *(Books and Publications: Book Chapter)* 1998

Sahni, V. and Z. Qian. "Analytical Asymptotic Structure of the Pauli, Coulomb and Correlation-Kinetic Components of the Kohn-Sham Exchange-Correlation Potential in Atoms." *Bulletin of the American Physical Society* 43: 199. *(Books and Publications: Article (Other))* 1998

Solomatin, A. and V. Sahni. "Structure of the Pauli and Correlation-Kinetic Components of the Kohn-Sham Exchange Potential at a Metal Surface." *Annals of Physics* 268: 149. *(Books and Publications: Article (Peer-reviewed))* 1998

"Physical Interpretation of Density Functional Theory and of Its Representation of the Hartree-Fock and Hartree Theories." *Physical Review A* 55: 1846. *(Books and Publications: Article (Peer-reviewed))* 1997

"Quantum Mechanics of Asymptotic Effective Potential and 'Image' Charge at Metal Surfaces." *Progress in Surface Science* 54: 115. *(Books and Publications: Article (Peer-reviewed))* 1997

Qian, Z. and V. Sahni. "Application of Quantum Mechanical Interpretation of Kohn-Sham Theory to the Hooke's Atom." *Bulletin of the American Physical Society* 42: 673. *(Books and Publications: Article (Other))* 1997

Slamet, M. and V. Sahni. "Physical Interpretation of Kohn-Sham Exchange Potential in Exchange-only Theory." *Bulletin of the American Physical Society* 42: 674. *(Books and Publications: Article (Other))* 1997

Solomatin, A. and V. Sahni. "Analytical Asymptotic Structure of the Kohn-Sham Exchange Potential at a Metal Surface." *Physical Review B* 56: 3655. *(Books and Publications: Article (Peer-reviewed))* 1997

Solomatin, A. and V. Sahni. "Analytical Asymptotic Structure of the Slater Exchange and Kohn-Sham Exchange and Correlation Potentials at a Metal Surface." *Annals of Physics* 259: 97. *(Books and Publications: Article (Peer-reviewed))* 1997

Solomatin, A. and V. Sahni. "Structure of the Correlation-Kinetic Component of the Kohn-Sham Exchange Potential at a Metal Surface." *Bulletin of the American Physical Society* 42: 674. *(Books and Publications: Article (Other))* 1997

Solomatin, A. and V. Sahni. "Structure of the Correlation-Kinetic Component of the Kohn-Sham Exchange Potential in Atoms and at Metal Surfaces." *International Journal of Quantum Chemistry* 65: 893. *(Books and Publications: Article (Peer-reviewed))* 1997

Solomatin, A. and V. Sahni. "Structure of the Pauli Component of the Kohn-Sham Exchange Potential at a Metal Surface." *Bulletin of the American Physical Society* 42: 674. *(Books and Publications: Article (Other))* 1997

"Quantum-mechanical Interpretation of Density-Functional Theory." *Bulletin of the American Physical Society* 41: 65. *(Books and Publications: Article (Other))* 1996

"Quantum-Mechanical Interpretation of Density-Functional Theory." Invited chapter. *Topics in Current Chemistry, Volume 182, on Density-Functional Theory.* Ed. R. Nalewajski. Heidelberg, Germany: Springer-Verlag. *(Books and Publications: Book Chapter)* 1996

"Reinterpretation of Electron Correlations in the Density Functional Theory Hartree, Local Density, and Gradient Expansion Approximations via the Work Formalism of Electronic Structure." Invited chapter. *Recent Advances in Density Functional Methods, Part I.* Ed. D.P. Chong. World Scientific. *(Books and Publications: Book Chapter)* 1996

Sen, K.D., A. Solomatin and V. Sahni. "The Hartree Approximation Revisited." *Bulletin of the American Physical Society* 41: 254. *(Books and Publications: Article (Other))* 1996

Solomatin, A. and V. Sahni. "Analytical Asymptotic Structure of the Exchange and Correlation Potentials at a Metal Surface." *Physical Letters A* 212: 263. *(Books and Publications: Article (Peer-reviewed))* 1996

Solomatin, A. and V. Sahni. "Analytical Asymptotic Structure of the Slater Exchange, and Kohn-Sham Exchange and Correlation Potentials at a Metal Surface." *Bulletin of the American Physical Society* 41: 64. *(Books and Publications: Article (Other))* 1996

"Derivation and Reinterpretation of Approximations in Schrödinger and Kohn-Sham Theory via a Hierarchy Within the Work Formalism." *International Journal of Quantum Chemistry* 53: 591. *(Books and Publications: Article (Peer-reviewed))* 1995

"Physical Interpretation of Electron Correlation in the Local Density Approximation." Invited paper. *Density Functional Theory, Volume 337.* NATO Advanced Study Institute, Series B: Physics. Eds. E.K.U. Gross and R.M. Dreizler. New York: Plenum. *(Books and Publications: Article (Peer-reviewed))* 1995

"The Work Formalism: A New Theory of Electronic Structure." Invited chapter. *Structure and Dynamics of Atoms and Molecules: Conceptual Trends.* Eds. J.L. Calais and E. Kryachko. Dordrecht, the Netherlands: Kluwer. *(Books and Publications: Article (Peer-reviewed))* 1995

Sahni, V. and A. Solomatin. "Exchange Potential by Restricted Functional Differentiation: Application to the Step-Potential Model of a Metal Surface." *Bulletin of the American Physical Society Transactions A* 40: 1506. *(Books and Publications: Article (Other))* 1995

Slamet, M. and V. Sahni. "Coulomb Holes and Correlation Potentials in the Helium Atom." *Physical Review A* 51: 2815. *(Books and Publications: Article (Peer-reviewed))* 1995

Solomatin, A. and V. Sahni. "Exchange Potentials at a Metal Surface." *International Journal of Quantum Chemistry Symposium* 29: 31. *(Books and Publications: Article (Peer-reviewed))* 1995

"Derivation of Approximation Schemes in Schrödinger and Density-Functional Theory via a Hierarchy Within the Work Formalism." *Bulletin of the American Physical Society* 39: 394. *(Books and Publications: Article (Other))* 1994

"The Work Formalism of Electronic Structure." *International Journal of Quantum Chemistry* 56: 265. (Invited paper at the Satellite Symposium of the 8th International Congress of Quantum Chemistry on Thirty Years of Density Functional Theory: Concepts and Applications. Cracow, Poland, June 13-16). *(Books and Publications: Article (Peer-reviewed))* 1994

Slamet, M. and V. Sahni. "Study of the Spherically-Symmetrical Component of the Coulomb Hole for Atoms in the Local Density Approximation." *Bulletin of the American Physical Society* 39: 394. *(Books and Publications: Article (Other))* 1994

Slamet, M., V. Sahni and M.K. Harbola. "Force Field and Potential Due to the Fermi-Coulomb Hole Charge for Nonspherical Density Atoms." *Physical Review A* 49: 809. *(Books and Publications: Article (Peer-reviewed))* 1994

Solomatin, A., V. Sahni and N.H. March. "Exchange Potential from Functional Differentiation in Self-consistent Field Theory of a Jellium-Type Metal Surface." *Bulletin of the American Physical Society* 39: 394. *(Books and Publications: Article (Other))* 1994

Solomatin, A., V. Sahni, and N.H. March. "Exchange Potential from Functional Differentiation in Self-consistent Field Theory of a Jellium-Type Metal Surface." *Physical Review B* 49: 16856. *(Books and Publications: Article (Peer-reviewed))* 1994

Harbola, M.K. and V. Sahni. "Asymptotic Structure of the Kohn-Sham Effective Potential at Metal Surfaces." *Bulletin of the American Physical Society* 38: 139. *(Books and Publications: Article (Other))* 1993

Harbola, M.K. and V. Sahni. "Asymptotic Structure of the Kohn-Sham Effective Potential at Metal Surfaces." *International Journal of Quantum Chemistry Symposium* 27: 101. *(Books and Publications: Article (Peer-reviewed))* 1993

Harbola, M.K. and V. Sahni. "Theories of Electronic Structure in the Pauli-Correlated Approximation." *Journal of Chemical Education* 70: 920. *(Books and Publications: Article (Peer-reviewed))* 1993

Sahni, V. and M. Slamet. "Interpretation of Electron Correlation in the Local Density Approximation for Exchange." *Bulletin of the American Physical Society* 38: 139. *(Books and Publications: Article (Other))* 1993

Sahni, V. and M. Slamet. "Interpretation of Electron Correlation in the Local Density Approximation for Exchange." *Physical Review B* 48: 1910. *(Books and Publications: Article (Peer-reviewed))* 1993

Sen, K.D., M. Slamet and V. Sahni. "Atomic Shell Structure in Hartree-Fock Theory." *Chemical Physics Letters* 205: 313. *(Books and Publications: Article (Peer-reviewed))* 1993

Slamet, M. and V. Sahni. "Structure of the Fermi-Coulomb and Coulomb Hole Charge Distributions of the Helium Atom." *Bulletin of the American Physical Society* 38: 139. *(Books and Publications: Article (Other))* 1993

Sahni, V. and M. Slamet. "The Gradient Expansion Approximation for Exchange: A Physical Perspective." *Bulletin of the American Physical Society* 37: 82. *(Books and Publications: Article (Other))* 1992

Sahni, V., Y. Li and M.K. Harbola. "Atomic Structure in the Pauli-Correlated Approximation." *Physical Review A* 45: 1434. *(Books and Publications: Article (Peer-reviewed))* 1992

Slamet, M. and V. Sahni. "Rigorous and Unifying Physical Interpretation of the Exchange Potential and Energy in the Local Density Approximation." *Physical Review B* 45: 4013. *(Books and Publications: Article (Peer-reviewed))* 1992

Slamet, M. and V. Sahni. "Structure of the Source Charge Distribution for the Exchange Potential and Energy in the Local Density Approximation." *Bulletin of the American Physical Society* 37: 82. *(Books and Publications: Article (Other))* 1992

Slamet, M. and V. Sahni. "The Gradient Expansion Approximation for Exchange: A Physical Perspective." *International Journal of Quantum Chemistry Symposium* 26: 333. *(Books and Publications: Article (Peer-reviewed))* 1992

Harbola, M.K., M. Slamet and V. Sahni. "Local Exchange-Correlation Potential From the Force Field of the Fermi-Coulomb Hole Charge for Non-Symmetric Systems." *Physical Letters A* 157: 60. *(Books and Publications: Article (Peer-reviewed))* 1991

Sahni, V. and M. Slamet. "Electric Fields of the Fermi Hole Charge in the Gradient and Generalized Gradient Expansion Approximation." *Bulletin of the American Physical Society* 36: 662. *(Books and Publications: Article (Other))* 1991

Sahni, V., M. Slamet and M.K. Harbola. "On the Path-dependence of the Potential From the Force-Field of the Fermi-Coulomb Hole Charge." *Bulletin of the American Physical Society* 36: 661. *(Books and Publications: Article (Other))* 1991

Slamet, M. and V. Sahni. "Analysis of the Density-Gradient Expansion Approximation for the Exchange-Correlation Energy of Density-Functional Theory." *International Journal of Quantum Chemistry Symposium* 25: 235. *(Books and Publications: Article (Peer-reviewed))* 1991

Slamet, M. and V. Sahni. "Analysis of the Fermi Hole in the Gradient and Generalized Gradient Expansion Approximations." *Bulletin of the American Physical Society* 36: 661. *(Books and Publications: Article (Other))* 1991

Slamet, M. and V. Sahni. "Study of the Generalized Gradient Expansion Approximation for the Exchange Energy." *Physical Review B* 44: 10921. *(Books and Publications: Article (Peer-reviewed))* 1991

Harbola, M.K. and V. Sahni. "Harbola and Sahni Reply." *Physical Review Letters* 65: 2609. *(Books and Publications: Article (Peer-reviewed))* 1990

Harbola, M.K. and V. Sahni. "Harbola and Sahni Reply." *Physical Review Letters* 65: 277. *(Books and Publications: Article (Peer-reviewed))* 1990

Harbola, M.K., M. Slamet and V. Sahni. "On the Path-Dependence of the Harbola-Sahni Exchange-Correlation Potential." *Bulletin of the American Physical Society* 35: 823. *(Books and Publications: Article (Other))* 1990

Kleinman, L. and V. Sahni. "Density Gradient Expansions." *Density-functional Theory of Many Fermion Systems.* Ed. S.B. Trickey. *Advances in Quantum Chemistry, Volume 21*. Academic Press. (Invited chapter to commemorate the 25th anniversary of the Hohenberg-Kohn Theorem.) *(Books and Publications: Book Chapter)* 1990

Sahni, V. and M.K. Harbola. "Quantum-Mechanical Interpretation of the Local Many-Body Potential of Density-Functional Theory." *International Journal of Quantum Chemistry Symposium* 24: 569. (Invited paper to commemorate the 30th Anniversary of the Sanibel Symposia). *(Books and Publications: Article (Peer-reviewed))* 1990

Sahni, V., Y. Li, J.B. Krieger and M.K. Harbola. "Ground-State Energies and Ionization Potentials of Atoms in the Exchange-Only Approximation." *Bulletin of the American Physical Society* 35: 823. *(Books and Publications: Article (Other))* 1990

"Hartree-Fock Theory of the Inhomogeneous Electron Gas at Metallic Surfaces." *Surface Science* 213: 226. (Invited paper submitted for the 12th International Seminar on Surface Physics, Piechowice, Poland, May 1988). *(Books and Publications: Article (Peer-reviewed))* 1989

Arnow, D.M., M.K. Harbola and V. Sahni. "Ground-State Energies and Ionization Potentials of Atoms in Exchange-Only Density-Functional Theory." *Bulletin of the American Physical Society* 34: 894. *(Books and Publications: Article (Other))* 1989

Harbola, M.K. and V. Sahni. "Quantum-Mechanical Interpretation of the Exchange-Correlation Potential of Kohn-Sham Density-Functional Theory." *Physical Review Letters* 62: 489. *(Books and Publications: Article (Peer-reviewed))* 1989

Harbola, M.K. and V. Sahni. "Quantum-Mechanical Origin of the Asymptotic Effective Potential at Metal Surfaces." *Physical Review B* 39: 10437. *(Books and Publications: Article (Peer-reviewed))* 1989

Harbola, M.K. and V. Sahni. "Quantum-Mechanical Origin of the Asymptotic Structure of the Effective Potential of Inhomogeneous Electron Gas Systems." *Bulletin of the American Physical Society* 34: 894. *(Books and Publications: Article (Other))* 1989

Harbola, M.K. and V. Sahni. "Theory of the Inhomogeneous Electron Gas." *Brooklyn College and Research Foundation of the City University of New York Research Report.* November. *(Books and Publications: Article (Peer-reviewed))* 1989

Li, Y., M.K. Harbola, J.B. Krieger and V. Sahni. "Ground-State Energies and Highest Occupied Eigenvalues of Atoms in Exchange-Only Density-Functional Theory." *Physical Review A* 40: 6084. *(Books and Publications: Article (Peer-reviewed))* 1989

Sahni, V. and M.K. Harbola. "Quantum-Mechanical Interpretation of the Exchange-Correlation Potential of Hohenberg-Kohn-Sham Density Functional Theory." *Bulletin of the American Physical Society* 34: 894. *(Books and Publications: Article (Other))* 1989

Arnow, D.M., M.K. Harbola and V. Sahni. "Study of Exchange-Correlation Energy Functionals via Their Hole Charge Densities." *Bulletin of the American Physical Society* 33: 277. *(Books and Publications: Article (Other))* 1988

Harbola, M.K. and V. Sahni. "Structure of the Exact Slater Exchange Potential and Wave-Vector Dependent Fermi Hole at Metallic Surfaces." *Bulletin of the American Physical Society* 33: 738. *(Books and Publications: Article (Other))* 1988

Harbola, M.K. and V. Sahni. "Structure of the Fermi Hole at Surfaces." *Physical Review B* 37: 745. *(Books and Publications: Article (Peer-reviewed))* 1988

Perdew, J.P., M.K. Harbola and V. Sahni. "Generalized Gradient Approximations for Exchange and Correlation: Numerical Tests and Prospects." *Condensed Matter Theories, Volume 3.* Eds. J.S. Arponen, R.F. Bishop and M. Manninen. New York: Plenum. *(Books and Publications: Article (Peer-reviewed))* 1988

Sahni, V., K.-P. Bohnen and M.K. Harbola. "Analysis of the Local Density Approximation of Density-Functional Theory." *Physical Review A* 37: 1895. *(Books and Publications: Article (Peer-reviewed))* 1988

Harbola, M.K. and V. Sahni. "Analysis of the Local Density Approximation." *Bulletin of the American Physical Society* 32: 857. *(Books and Publications: Article (Other))* 1987

Harbola, M.K. and V. Shani. "Asymptotic Structure of the Slater-Exchange Potential at Metallic Surfaces." *Physical Review B* 36: 5024. *(Books and Publications: Article (Peer-reviewed))* 1987

Sahni, V. and M.K. Harbola. "Structure of the Fermi Hole at Surfaces." *Bulletin of the American Physical Society* 32: 723. *(Books and Publications: Article (Other))* 1987

Bohnen, K.-P. and V. Sahni. "The Local Density Approximation." *Bulletin of the American Physical Society* 31: 301. *(Books and Publications: Article (Other))* 1986

Harbola, M.K., V. Sahni, J.P. Perdew and R.K. Pathak. "Gradient Expansion of the Fermion Kinetic Energy: Extra Terms for Non-analytic Densities." *Bulletin of the American Physical Society* 31: 302. *(Books and Publications: Article (Other))* 1986

Perdew, J.P., V. Sahni, M.K. Harbola and R.K. Pathak. "Fourth-Order Gradient Expansion of the Fermion Kinetic Energy: Extra Terms for Nonanalytic Densities." *Physical Review B* 34: 686. *(Books and Publications: Article (Peer-reviewed))* 1986

Sahni, V. and M. Levy. "Exchange and Correlation Energies in Density-Functional Theory: Bounds from Available Data." *Physical Review B* 33: 3869. *(Books and Publications: Article (Peer-reviewed))* 1986

Sahni, V. and M. Levy. "On Exchange and Correlation Energies in Density-Functional Theory: Bounds from Available Data." *Bulletin of the American Physical Society* 31: 302. *(Books and Publications: Article (Other))* 1986

Mohammed, A.-R.E. and V. Sahni. "Density-Functional-Theory Studies of Correlation Energy Effects at Metallic Surfaces." *Physical Review B* 31: 4879. *(Books and Publications: Article (Peer-reviewed))* 1985

Mohammed, A.-R.E. and V. Sahni. "Density-Functional-Theory Studies of the Correlation Energy Effects at Metallic Surfaces." *Bulletin of the American Physical Society* 30: 262. *(Books and Publications: Article (Other))* 1985

Sahni, V. and K.-P. Bohnen. "Image Charge at a Metal Surface." *Physical Review B* 31: 7651. *(Books and Publications: Article (Peer-reviewed))* 1985

Sahni, V. and K.-P. Bohnen. "The Image Charge at Metal Surface." *Bulletin of the American Physical Society* 30: 263. *(Books and Publications: Article (Other))* 1985

Levy, M., J.P. Perdew and V. Sahni. "Exact Differential Equation for the Density and Ionization Energy of a Many-Particle System." *Physical Review A* 30: 2745. *(Books and Publications: Article (Peer-reviewed))* 1984

Levy, M., J.P. Perdew and V. Sahni. "Exact Differential Equation for the Density of a Many-Particle System." *Bulletin of the American Physical Society* 29: 350. *(Books and Publications: Article (Other))* 1984

Mohammed, A.-R.E. and V. Sahni. "Density Functional Theory Gradient Expansion Approximation for the Screened-Coulomb Exchange Energy." *Physical Review B* 29: 3687. *(Books and Publications: Article (Peer-reviewed))* 1984

Mohammed, A.-R.E. and V. Sahni. "Density-Functional-Theory Studies of Correlation Energy Effects at Metallic Surfaces." *Brooklyn College and Research Foundation of the City University of New York Research Report.* December. *(Books and Publications: Article (Peer-reviewed))* 1984

Mohammed, A.-R.E. and V. Sahni. "The Density-Functional Theory Gradient Expansion Approximation for the Screened-Coulomb Exchange Energy." *Bulletin of the American Physical Society* 29: 351. *(Books and Publications: Article (Other))* 1984

Sahni, V. and K.-P. Bohnen. "The Exchange Charge Density at Metallic Surfaces." *Bulletin of the American Physical Society* 29: 265. *(Books and Publications: Article (Other))* 1984

Sahni, V. and K.-P. Bohnen. "The Exchange Charge Density at Metallic Surfaces." *Physical Review B* 29: 1045. *(Books and Publications: Article (Peer-reviewed))* 1984

Mohammed, A.-R.E. and V. Sahni. "Convergence Study of the Density-Gradient Expansion for the Screened Coulomb Exchange Energy." *Physical Review B* 28: 3014. *(Books and Publications: Article (Peer-reviewed))* 1983

Mohammed, A.-R.E. and V. Sahni. "Convergence Study of the Density-gradient Expansion for the Screened-Coulomb Exchange Energy." *Bulletin of the American Physical Society* 28: 266. *(Books and Publications: Article (Other))* 1983

Sahni, V. and J. Gruenebaum. "Remarks on Local and Non-local Exchange and Correlation Energy Calculations of Surface Energies and Work Functions." *Physical Review B* 25: 6275. *(Books and Publications: Article (Peer-reviewed))* 1982

Sahni, V. and J. Gruenebaum. "Sensitivity of Metal Surface Properties to Input Pseudopotentials and Correlation Energies." *Bulletin of the American Physical Society* 27: 209. *(Books and Publications: Article (Other))* 1982

Sahni, V., J. Gruenebaum and J.P. Perdew. "Study of the Density Gradient Expansion for the Exchange Energy." *Physical Review B* 26: 4371. *(Books and Publications: Article (Peer-reviewed))* 1982

Sahni, V. and C.Q. Ma. "Comment on Local and Non-local Exchange and Correlation Energy Calculations of the Work Function." *Bulletin of the American Physical Society* 26: 472. *(Books and Publications: Article (Other))* 1981

Sahni, V., J. Gruenebaum and J.P. Perdew. "Study of the Density Gradient Expansion for the Exchange Energy." *Bulletin of the American Physical Society* 26: 470. *(Books and Publications: Article (Other))* 1981

Sahni, V., J.P. Perdew and J. Gruenebaum. "Variational Calculations of Low-Index Crystal Face-Dependent Surface Energies and Work Functions of Simple Metals." *Physical Review B* 23: 6512. *(Books and Publications: Article (Peer-reviewed))* 1981

Ma, C.Q. and V. Sahni. "Application of Variational Principles for Single-Particle Expectation Values to the Metal Surface Problem." *Physical Review B* 22: 1843. *(Books and Publications: Article (Peer-reviewed))* 1980

Sahni, V. and C.Q. Ma. "Accurate Estimates of Correlation Effect Contributions to the Surface Properties of Jellium Metal." *Bulletin of the American Physical Society* 25: 292. *(Books and Publications: Article (Other))* 1980

Sahni, V. and C.Q. Ma. "Hartree-Fock Theory of the Inhomogeneous Electron Gas at a Jellium Metal Surface: Rigorous Upper Bounds to the Surface Energy and Accurate Work Functions." *Physical Review B* 22: 5987. *(Books and Publications: Article (Peer-reviewed))* 1980

Sahni, V., J. Gruenebaum and J.P. Perdew. "Accurate Calculations of Low Index Crystal Face Dependent Surface Properties of Simple Metals." *Bulletin of the American Physical Society* 25: 236. *(Books and Publications: Article (Other))* 1980

Ma, C.Q. and V. Sahni. "Accurate Calculations of the Surface Properties of an Inhomogeneous Hartree-Fock Gas." *Bulletin of the American Physical Society* 24: 439. *(Books and Publications: Article (Other))* 1979

Ma, C.Q. and V. Sahni. "Statistical Calculation of Jellium Surface Properties." *Physical Review B* 19: 1290. *(Books and Publications: Article (Peer-reviewed))* 1979

Ma, C.Q. and V. Sahni. "Study of the Exchange Energy of an Inhomogeneous Electron Gas at a Surface." *Physical Review B* 20: 2291. *(Books and Publications: Article (Peer-reviewed))* 1979

Ma, C.Q. and V. Sahni. "Study of the Inhomogeneous Electron Gas at Surfaces." *Brooklyn College and Research Foundation of CUNY, Research Report.* February. *(Books and Publications: Article (Peer-reviewed))* 1979

Perdew, J.P. and V. Sahni. "Accurate and Easy Method for Work Function Calculations." *Solid State Communications* 30: 87. *(Books and Publications: Article (Peer-reviewed))* 1979

Sahni, V. and C.Q. Ma. "Simple and Accurate Statistical Calculations of Jellium Metal Surface Properties." *Physical Review B* 20: 3511. *(Books and Publications: Article (Peer-reviewed))* 1979

Sahni, V. and J. Gruenebaum. "Rayleigh-Ritz Variational Calculation of Real-Metal-Surface Properties." *Physical Review B* 19: 1840. *(Books and Publications: Article (Peer-reviewed))* 1979

Ma, C.Q. and V. Sahni. "Exact Calculation of the Surface Exchange Energy." *Bulletin of the American Physical Society* 23: 259. *(Books and Publications: Article (Other))* 1978

Ma, C.Q. and V. Sahni. "Variational Calculation of the Electronic Density at Surfaces." *Bulletin of the American Physical Society* 23: 259. *(Books and Publications: Article (Other))* 1978

Ma, C.Q. and V. Sahni. "Variational Calculation of the Electronic Density at Surfaces." *Solid State Communications* 27: 1193. *(Books and Publications: Article (Peer-reviewed))* 1978

Sahni, V., C.Q. Ma and J.S. Falmholz. "Study of a Neutrally Charged Electron Gas With a Surface." *Physical Review B* 18: 3931. *(Books and Publications: Article (Peer-reviewed))* 1978

Ma, C.Q. and V. Sahni. "Study of the Density Gradient Expansion for the Kinetic Energy." *Physical Review B* 16: 4249. *(Books and Publications: Article (Peer-reviewed))* 1977

Ma, C.Q., J.S. Flamholz and V. Sahni. "Metal Surface Properties in the Finite Linear Potential Model." *Bulletin of the American Physical Society* 22: 365. *(Books and Publications: Article (Other))* 1977

Perdew, J.P., D.C. Langreth and V. Sahni. "Corrections to the Local Density Approximation: Gradient Expansion Versus the Wave-Vector Analysis for the Metallic Surface Problem." *Physical Review Letters* 38: 1030. *(Books and Publications: Article (Peer-reviewed))* 1977

Perdew, J.P., D.C. Langreth and V. Sahni. "Corrections to the Local Density Approximation: Gradient Expansion vs. Wavevector Analysis for the Metallic Surface Problem." *Bulletin of the American Physical Society* 22: 366. *(Books and Publications: Article (Other))* 1977

Sahni, V. and J. Gruenebaum. "Metal Surface Energies in the Infinite and Step-potential Approximations." *Physical Review B* 15: 1929. *(Books and Publications: Article (Peer-reviewed))* 1977

Sahni, V. and J. Gruenebaum. "Variational Calculation of Metal Surface Energies." *Solid State Communications* 21: 463. *(Books and Publications: Article (Peer-reviewed))* 1977

Sahni, V. and J. Gruenebaum. "Variational-Perturbation Calculation of Metal Surface Energies." *Bulletin of the American Physical Society* 22: 365. *(Books and Publications: Article (Other))* 1977

Sahni, V., J.B. Krieger and J. Gruenebaum. "Metal Surface Properties in the Linear Potential Approximation." *Physical Review B* 15: 1941. *(Books and Publications: Article (Peer-reviewed))* 1977

Sahni, V. and J. Gruenebaum. "Metal Surface Energies." *Bulletin of the American Physical Society* 21: 242. *(Books and Publications: Article (Other))* 1976

Sahni, V. and J.B. Krieger. "Variational Principles for the Determination of Single-particle Density Matrices." *Physical Review A* 11: 409. *(Books and Publications: Article (Peer-reviewed))* 1975

Sahni, V., J.B. Krieger and J. Gruenebaum. "Analytic Calculation of Metal Surface Dipole Moments in the Step-potential Approximations." *Physical Review B* 12: 3503. *(Books and Publications: Article (Peer-reviewed))* 1975

Sahni, V., J.B. Krieger and J. Gruenebaum. "Metal Surface Dipole Moments." *Bulletin of the American Physical Society* 20: 589. *(Books and Publications: Article (Other))* 1975

Sahni, V., J.B. Krieger and J. Gruenebaum. "Variational Calculation of the Single-particle Density Matrix and Momentum Density for the Helium Ground State Isoelectronic Sequence." *Physical Review A* 12: 768. *(Books and Publications: Article (Peer-reviewed))* 1975

"Variational Calculation of the Single-particle Density Matrix and Momentum Density for the He Isoelectronic Sequence." *Bulletin of the American Physical Society* 19: 571. *(Books and Publications: Article (Other))* 1974

Sahni, V. and J.B. Krieger. "Variational Calculation for the Determination of Single-particle Density Matrices." *Bulletin of the American Physical Society* 19: 236. *(Books and Publications: Article (Other))* 1974

Sahni, V. and J.B. Krieger. "Variational Calculation of Expectation Values for the 23S and 21S Helium Isoelectronic Sequence." *Bulletin of the American Physical Society* 18: 727. *(Books and Publications: Article (Other))* 1973

Sahni, V. and J.B. Krieger. "Variational Principles for Single-Particle Expectation Values in the Hartree-Fock Approximation." *Physical Review A* 8: 65. *(Books and Publications: Article (Peer-reviewed))* 1973

Krieger, J.B. and V. Sahni. "Variational Principles for Single-Particle Expectation Values in the Hartree Approximation." *Physical Review A* 6: 919. *(Books and Publications: Article (Peer-reviewed))* 1972

Sahni, V. and J.B. Krieger. "Analytic Calculation of the Coherent Atomic Scattering Factor for the Ground State of the Helium Isoelectronic Sequence." *Physical Review A* 6: 928. *(Books and Publications: Article (Peer-reviewed))* 1972

Sahni, V. and J.B. Krieger. "Results of an Analytic Calculation for the Coherent Atomic Scattering Factor for the Ground State of the Helium Isoelectronic Sequence." *International Journal of Quantum Chemistry Symposium* 6: 103. *(Books and Publications: Article (Peer-reviewed))* 1972

Sahni, V. and J.B. Krieger. "Variational Principles for Single-Particle Expectation Values for Multiparticle Systems." *Polytechnic Institute of Brooklyn Report PIBPH 72: 006* July. *(Books and Publications: Article (Peer-reviewed))* 1972

Sahni, V., J.B. Krieger and J.S. Flamholz. "Variational Calculation of Single-Particle Expectation Values in the Hartree-Fock Approximation." *Bulletin of the American Physical Society* 17: 352. *(Books and Publications: Article (Other))* 1972

Krieger, J.B. and V. Sahni. "Calculation of Single Particle Expectations Correct to Second Order in the Hartree Approximation." *Bulletin of the American Physical Society* 16: 647. *(Books and Publications: Article (Other))* 1971

Sahni, V. and J.B. Krieger. "Analytic Calculation of the Coherent Atomic Scattering Factor for the Helium Isoelectronic Sequence." *Bulletin of the American Physical Society* 16: 647. *(Books and Publications: Article (Other))* 1971

Sahni, V. and J.B. Krieger. "Calculation of Expectation Values Correct to Second Order Applied to the Ground State of the Helium Isoelectronic Sequence." *International Journal of Quantum Chemistry Symposium * 5: 47. *(Books and Publications: Article (Peer-reviewed))* 1971

Sahni, V. and J.B. Krieger. "Calculation of Single-Particle Atomic Expectations." *Bulletin of the American Physical Society* 16: 26. *(Books and Publications: Article (Other))* 1971

Das, P. and V. Sahni. "Hot Electron Galvanomagnetic Coefficients of Polar Semiconductors." *Journal of Physics* C1: 1398. *(Books and Publications: Article (Peer-reviewed))* 1968

### Awards, Honors and Fellowships

PSC-CUNY Award #65036-0043, for "Generalization of the Hohenberg-Kohn and Levy-Lieb Theorems to the Presence of a Magnetostatic Field." $3,499.50. *(Grants and Fellowships)* 2012

PSC-CUNY Award #63411-0041, for "Quantal Density Functional Theory in the Presence of a Electromagnetic Field." $2,751. *(Grants and Fellowships)* 2010

India-U.S. Professorship Award in Physics, sponsored by the Indo-U.S. Science and Technology Forum and the American Physical Society. V. Sahni and K.D. Sen, co-recipients. *(Awards and Honors)* 2009

PSC-CUNY Award #62241-00 40, for "Study of the Pauli Potential and Pauli Kinetic Energy via Quantal Density Functional Theory." $2,755. *(Grants and Fellowships)* 2009

PSC-CUNY Award RF#68233-0037, for "Determination of a Wave Function Functional." $2,869. *(Grants and Fellowships)* 2006

PSC-CUNY Award RF#67287-0036, for "Determination of a Wave Function Functional." $2,834. *(Grants and Fellowships)* 2005

CUNY Collaborative Incentive Award, for "Quantal Density Functional Theory: Application to Light Atoms in their Ground and Excited States." V. Sahni and L. Massa, co-recipients. $68,000; Sept. 1, 2004 - May 31, 2007. *(Grants and Fellowships)* 2004

PSC-CUNY Award RF#66567-0035, for "Quantal Density Functional Theory of Multi-Component Systems." $3,471. *(Grants and Fellowships)* 2004

PSC-CUNY Award RF#65494-0034, for "Quantal Density Functional Theory Applied to the Hydrogen Molecule and Its Dissociation." $3,052. *(Grants and Fellowships)* 2003

PSC-CUNY Award RF#64527-0033, for "Quantal Density Functional Theory Applied to the Hydrogen Molecule and its Dissociation." $3,464. *(Grants and Fellowships)* 2002

PSC-CUNY Award RF#63504-0032, for "Quantal Density Functional Theory of the Density Amplitude, and the Pauli Potential and Kinetic Energy." $3,314. *(Grants and Fellowships)* 2001

PSC-CUNY Award RF#62569 00 31, for "An Alternate Many-body Perturbation Theory of Electronic Structure." $2,837. *(Grants and Fellowships)* 2000

CUNY Emergency Research Award RF#668636, for "Application of Quantal Density Functional Theory to the Ground and Singly - and Doubly - Excited States of the He Atom." $12,000; Oct. 1, 1998 - June 30, 2000. *(Grants and Fellowships)* 1998

PSC-CUNY Award RF#6-69469, for "Studies in Kohn-Sham Density-Functional Theory From the Perspective of its Quantum-Mechanical Interpretation." $3,481. *(Grants and Fellowships)* 1998

PSC-CUNY Award RF#6-68462, for "Quantum-mechanical Interpretation of Density-Functional Theory." $3,887. *(Grants and Fellowships)* 1997

CUNY Collaborative Incentive Award, for "The Work Interpretation of Density Functional Theory Applied to the Diffuse Interstellar Band Mystery." V. Sahni and L. Massa, co-recipients. $30,000; Sept. 1, 1996 - Aug. 31, 1998. *(Grants and Fellowships)* 1996

PSC-CUNY Award RF#6-67439, for "Quantum-mechanical Interpretation of Density-Functional Theory." $3,848. *(Grants and Fellowships)* 1996

PSC-CUNY Award RF#6-66427, for "Study of Electron Correlation in Atoms." $4,002. *(Grants and Fellowships)* 1995

PSC-CUNY Award RF#6-65398, for "Study of Electron Correlation in Atoms." $4,549. *(Grants and Fellowships)* 1994

National Science Foundation grant, for "Theory of Electronic Structure." $52,000; Sept. 1, 1991 - Aug. 31, 1993. *(Grants and Fellowships)* 1991

The Petroleum Research Fund of the American Chemical Society grant, for "Theory of the Inhomogeneous Electron Gas." $40,000; May 1, 1991 - Aug. 31, 1993. *(Grants and Fellowships)* 1991

PSC-CUNY Award RF#6-69378, for "Theory of the Inhomogeneous Electron Gas." $1,900. *(Grants and Fellowships)* 1989

PSC-CUNY Award RF#666446, for "Studies in Density-Functional Theory." $8,453. *(Grants and Fellowships)* 1986

PSC-CUNY Award RF#6-65277, for "Studies in Density-Functional Theory." $8,157. *(Grants and Fellowships)* 1985

PSC-CUNY Award RF#664290, for "Studies in Density-Functional Theory as Applied to Surfaces." $4,980. *(Grants and Fellowships)* 1984

PSC-CUNY Award RF#6-63371, for "Study of the Density-Gradient Expansions for Bare and Screened-Coulomb Exchange Energies." $5,700. *(Grants and Fellowships)* 1983

PSC-CUNY Award RF#13975, for "Variational Linear Response Theory of Metal Surface Electronic Structure." $6,060. *(Grants and Fellowships)* 1982

PSC-CUNY Award RF#13755, for "Theoretical Studies in Surface Physics." $900. *(Grants and Fellowships)* 1981

PSC-CUNY Award RF#13426, for "Studies in Surface Physics." $5,100. *(Grants and Fellowships)* 1980

PSC-CUNY Award RF#13107, for "Studies in Surface Physics." $11,211. *(Grants and Fellowships)* 1979

PSC-CUNY Awards RF#12368, for "Studies in Surface Physics." $11,130. *(Grants and Fellowships)* 1978

PSC-CUNY Award RF#11699, for "Calculation of Metal Surface Properties and the Study of Density Gradient Expansions." $11,144. *(Grants and Fellowships)* 1977

PSC-CUNY Awards RF#11491, for "Calculation of Metal Surface Properties and the Study of Density Gradient Expansions." $7,100. *(Grants and Fellowships)* 1976

PSC-CUNY Award RF#11140, for "Calculation of Charge Density and Related Phenomena Near Solid Metallic Surfaces." $9,100. *(Grants and Fellowships)* 1974

PSC-CUNY Award RF#10283, for "Variational Principles for the Determination of Single- and Two-particle Density Matrices." $500. *(Grants and Fellowships)* 1973

### Conferences, Seminars and Symposiums

V. Sahni, "New Perspectives on the Quantum Theory of Electrons", Invited talk at Brooklyn College, May 18, 2021. *(Conferences, Seminars and Symposiums: Invited Talk)* 2021

V. Sahni, "The 'Quantal Newtonian" First Law: A Complementary Perspective on the Stationary-state Quantum Theory of Electrons", Invited Talk at the 17th Theoretical Chemistry Symposium 2021 at the Indian Institute of Science Education and Research, Kolkata, India (Dec. 11-14, 2021). *(Conferences, Seminars and Symposiums: Invited Talk)* 2021

M. Slamet and V. Sahni, "Triplet State of a Quantum Dot in a Magnetic Field: A 'Quantal Newtonian' First Law Study", http://meetings.aps.org/Meeting/MAR19/Session/L32.12

*(Conferences, Seminars and Symposiums: Contributed Talk)* 2019

V. Sahni, "Schroedinger-Pauli Theory of Electrons: New Perspectives", http://meetings.aps.org/Meeting/MAR19/Session/L31.5 *(Conferences, Seminars and Symposiums: Contributed Talk)* 2019

V. Sahni, "Generalization of the Schroedinger Theory of Electrons in Electromagnetic Fields"

Symposium on the Fundamentals of Density Functional Theory: A Celebration of the Works of Mel Levy,

Graduate Center of CUNY, May 19, 2017 *(Conferences, Seminars and Symposiums: Invited Talk)* 2017

M. Slamet and V. Sahni, "Study of a Quantum Dot in an Excited State", Bulletin of the American Physical Society 61, 357 (2016) *(Conferences, Seminars and Symposiums: Conference Presentation)* 2016

V. Sahni and X.- Y. Pan, "Study of the Schroedinger Theory for Electrons in External Fields", Bulletin of the American Physical Society, 61, 408 (2016) *(Conferences, Seminars and Symposiums: Conference Presentation)* 2016

"Schroedinger Theory of the Electronic Structure of Matter from a 'Newtonian' Perspective." Theoretical and Computational Chemistry Conference. New York, May 19. (Invited talk) *(Conferences, Seminars and Symposiums: Invited Talk)* 2015

Sahni, V. and X.-Y. Pan. "Basic Variables of Quantum Mechanics for Electrons in Electrostatic and Magnetostatic Fields" *Bulletin of the American Physical Society* 60: 748. *(Conferences, Seminars and Symposiums: Conference Presentation)* 2015

Sahni, V., X.-Y. Pan and T. Yang. "Quantal Density Functional Theory (QDFT): Further Understandings." *Bulletin of the American Physical Society* 60: 287. *(Conferences, Seminars and Symposiums: Conference Presentation)* 2015

Achan, D., L. Massa and V. Sahni. "Wigner High Electron Correlation Regime of Nonuniform Electron Density Systems: A Quantal Density Functional Theory (QDFT) Study." *Bulletin of the American Physical Society* 59: 477. *(Conferences, Seminars and Symposiums: Conference Presentation)* 2014

Sahni, V. and X.-Y. Pan. "Hohenberg-Kohn Theorem Including Electron Spin in the Presence of a Magnetostatic Field." *Bulletin of the American Physical. Society* 59: 477. *(Conferences, Seminars and Symposiums: Conference Presentation)* 2014

Pan, X.-Y. and V. Sahni. "Quantal Density Functional Theory (QDFT) in the Presence of an Electromagnetic Field" *Bulletin of the American Physical Society* 58: 283. *(Conferences, Seminars and Symposiums: Conference Presentation)* 2013

Sahni, V. and X.-Y. Pan, "Basic Variables in the Presence of a Magnetostatic Field." *Bulletin of the American Physical Society* 58: 283. *(Conferences, Seminars and Symposiums: Conference Presentation)* 2013

Sahni, V. and X.-Y. Pan. "Recent Developments in Density Functional Theory in the Presence of a Magnetostatic Field." International Symposium and Workshop on Electron Correlations and Materials Properties of Compounds and Alloys. Porto Heli, Greece, July 9-13. *(Conferences, Seminars and Symposiums: Invited Talk)* 2012

Sahni, V. and X.-Y. Pan. "Generalization of the Hohenberg-Kohn Theorem to the Case of the Presence of a Magnetic Field." *Bulletin of the American Physical Society* 56: 525. *(Conferences, Seminars and Symposiums: Conference Presentation)* 2011

Sahni, V., M. Slamet and X.-Y Pan. "Constrained Search Construction of Wave Function Functionals That Reproduce the Density." 94th Canadian Chemistry Conference. Montreal, June 5-9. CSC2011 Program, p. 154. *(Conferences, Seminars and Symposiums: Invited Talk)* 2011

Slamet, M., X.-Y. Pan and V. Sahni. "Wave Function Functionals for the Density." *Bulletin of the American Physical Society* 56: 597. *(Conferences, Seminars and Symposiums: Conference Presentation)* 2011

Yang, T., X.-Y. Pan and V. Sahni. "Quantal Density Functional Theory (QDFT) in the Presence of a Magnetic Field." *Bulletin of the American Physical Society* 56: 525. *(Conferences, Seminars and Symposiums: Conference Presentation)* 2011

Pan, X.-Y. and V. Sahni. "Basic Variables in Density Functional Theory in the Presence of a Magnetic Field." 50th Sanibel Symposium. St. Simons Island, Ga., Feb. 24-March 2. *(Conferences, Seminars and Symposiums: Conference Presentation)* 2010

Pan, X.-Y. and V. Sahni. "Is the Wave Function Solely a Functional of the Density?" 48th Sanibel Symposium on Atomic, Molecular, Biophysical and Condensed Matter Theory. St. Simons Island, Ga., Feb. 21-26. *(Conferences, Seminars and Symposiums: Conference Presentation)* 2008

"Quantal Density Functional Theory: Beyond Hohenberg-Kohn-Sham Theory." 26th International Colloquium on Group Theoretical Methods in Physics. New York, June 26-30. *(Conferences, Seminars and Symposiums: Invited Talk)* 2006

Pan, X.-Y., V. Sahni and L. Massa. "Fundamental Importance of the Coulomb Hole Sum Rule to Understanding of the Colle-Salvetti Wave Function." Abstracts of papers. 231st American Chemical Society National Meeting. Atlanta, March 26-30. *(Conferences, Seminars and Symposiums: Conference Presentation)* 2006

Sahni, V. and M. Slamet. "Quantal Density Functional Theory: Wave Function Arbitrariness of the Noninteracting Fermion Model." 46th Sanibel Symposium on Atomic, Molecular, Biophysical and Condensed Matter Theory. St. Simons Island, Ga., Feb. 26-March 3. *(Conferences, Seminars and Symposiums: Conference Presentation)* 2006

"Determination of a Wave Function Functional." 3rd International Workshop on Electron Correlations and Materials Properties. Kos, Greece, July 5-9. *(Conferences, Seminars and Symposiums: Invited Talk)* 2004

Sahni, V. and M. Slamet. "The State Arbitrariness of the Model Noninteracting Fermion System in Quantal Density Functional Theory." 44th Sanibel Symposium on Atomic, Molecular, Biophysical and Condensed Matter Theory. St. Augustine, Fla., Feb. 28 - March 5. *(Conferences, Seminars and Symposiums: Conference Presentation)* 2004

"Corollary to the Hohenberg-Kohn Theorem." 8th International Wigner Symposium. New York, May 27-30. *(Conferences, Seminars and Symposiums: Conference Presentation)* 2003

"Corollary to the Hohenberg-Kohn Theorem." 8th International Wigner Symposium. New York, May. *(Conferences, Seminars and Symposiums: Invited Talk)* 2003

"Electron Correlations Contributing to the Asymptotic Structure of the Effective Potential Energy at Metal Surfaces." Frontiers in Condensed Matter Theory Symposium. Pennsylvania State University. University Park, Pa., April 12-13. *(Conferences, Seminars and Symposiums: Conference Presentation)* 2003

Pan, X.-Y. and V. Sahni. "Corollary to the Hohenberg-Kohn Theorem." 43rd Sanibel Symposium. Feb. 22 - March 1. *(Conferences, Seminars and Symposiums: Conference Presentation)* 2003

"Quantal Density Functional Theory." 2nd International Workshop on Electron Correlations and Materials Properties. Rhodes, Greece, June. *(Conferences, Seminars and Symposiums: Conference Presentation)* 2001

"Quantal Density Functional Theory." 41st Sanibel Symposium on Atomic, Molecular and Condensed Matter Theory. St. Augustine, Fla., Feb. 24 - March 2. *(Conferences, Seminars and Symposiums: Invited Talk)* 2001

"Quantal Density Functional Theory." 41st Sanibel Symposium on Atomic, Molecular and Condensed Matter Theory. St. Augustine, Fla., February. *(Conferences, Seminars and Symposiums: Invited Talk)* 2001

"Quantal Density-Functional Theory." 2nd International Workshop on Electron Correlations and Materials Properties. Rhodes, Greece, June. *(Conferences, Seminars and Symposiums: Invited Talk)* 2001

Slamet, M. and V. Sahni. "Quantal Density Functional Theory of Excited States: Application to an Exactly Solvable Model." 41st Sanibel Symposium. Feb. 24 - March 2. *(Conferences, Seminars and Symposiums: Conference Presentation)* 2001

Qian, Z. and V. Sahni. "Analytical Properties of the Kohn-Sham Theory 'Exchange' and 'Correlation' Energy and Potential via Quantal Density Functional Theory." 40th Sanibel Symposium. Feb. 26 - Mar. 3. *(Conferences, Seminars and Symposiums: Conference Presentation)* 2000

"Quantal Density-Functional Theory." Centennial Meeting of the American Physical Society. Atlanta, March. *(Conferences, Seminars and Symposiums: Invited Talk)* 1999

Qian, Z. and V. Sahni. "Analytical Asymptotic Structure of the Pauli, Coulomb and Correlation-Kinetic Components of the Electron-Interaction Potential of Kohn-Sham Theory in Atoms." Sanibel Symposium. Feb. 21-27. *(Conferences, Seminars and Symposiums: Conference Presentation)* 1998

Singh, R., L. Massa and V. Sahni. "Quantal Density Functional Theory (Q-DFT): The Helium Atom." Symposium on Quantum Chemistry in Honor of R.G. Parr, 50th Southeastern Regional Meeting of the American Chemical Society. Research Triangle Park, N.C. Nov. 4-7. *(Conferences, Seminars and Symposiums: Conference Presentation)* 1998

"Quantum Mechanical Interpretation of Density Functional Theory." 213th American Chemical Society Meeting Symposium on Recent Developments in Density Functional Theory: From First Principles to Molecular Dynamics. San Francisco, April 13-17. *(Conferences, Seminars and Symposiums: Invited Talk)* 1997

Solomatin, A. and V. Sahni. "Structure of the Correlation-kinetic Component of the Kohn-Sham Exchange Potential in Atoms and at Metal Surfaces." Sanibel Symposium. March 1-7. *(Conferences, Seminars and Symposiums: Conference Presentation)* 1997

Solomatin, A. and V. Sahni. "Exchange Potential by Restricted Functional Differentiation of the Exact Exchange Energy Functional." *Bulletin of the American Physical Society* 40: 65. *(Conferences, Seminars and Symposiums: Conference Presentation)* 1995

Solomatin, A. and V. Sahni. "Exchange Potentials at a Metal Surface." Sanibel Symposium. Feb. 25-March 4. *(Conferences, Seminars and Symposiums: Conference Presentation)* 1995

"The Work Formalism of Electronic Structure." 8th International Congress of Quantum Chemistry. Cracow, Poland, June. *(Conferences, Seminars and Symposiums: Invited Talk)* 1994

"The Work Formalism of Electronic Structure." Satellite Symposium, 8th International Congress of Quantum Chemistry on Thirty Years of Density Functional Theory: Concepts and Applications. Cracow, Poland, June 13-16. *(Conferences, Seminars and Symposiums: Invited Talk)* 1994

"Physical Interpretation of Electron Correlation in the Local Density Approximation." NATO Advanced Study Institute on Density Functional Theory. Castelvecchio Pascoli. Tuscany, Italy, Aug. 16-27. *(Conferences, Seminars and Symposiums: Invited Talk)* 1993

Harbola, M.K. and V. Sahni. "Asymptotic Structure of the Kohn-Sham Effective Potential at Metal Surfaces." Sanibel Symposium. March 13-20. *(Conferences, Seminars and Symposiums: Conference Presentation)* 1993

Sahni, V. and M. Slamet. "Rigorous and Unifying Physical Interpretation of the Exchange Potential and Energy in the Local Density Approximation." *Bulletin of the American Physical Society* 37: 82. *(Conferences, Seminars and Symposiums: Conference Presentation)* 1992

Slamet, M. and V. Sahni. "The Gradient Expansion Approximation for Exchange: A Physical Perspective." Sanibel Symposium. March 14-21. *(Conferences, Seminars and Symposiums: Conference Presentation)* 1992

Slamet, M. and V. Sahni. "Analysis of the Gradient Expansion Approximation of Density-Functional Theory." Sanibel Symposium. March 9-16. *(Conferences, Seminars and Symposiums: Conference Presentation)* 1991

"Quantum-Mechanical Interpretation of the Local Many-Body Potential of Density-Functional Theory." 30th Anniversary Commemoration of the Sanibel Symposia. March 17-24. *(Conferences, Seminars and Symposiums: Invited Talk)* 1990

"Quantum-Mechanical Interpretation of the Local Many-Body Potential of Density-Functional Theory." International Sanibel Symposia on Atomic, Molecular, and Condensed Matter Theory. St. Augustine, Fla., March. *(Conferences, Seminars and Symposiums: Invited Talk)* 1990

"Hartree-Fock Theory of the Inhomogeneous Electron Gas at Metallic Surfaces." 12th International Seminar on Surface Physics. Piechowice, Poland, May. *(Conferences, Seminars and Symposiums: Invited Talk)* 1988

"Metal Surface Electronic Structure in the Hartree-Fock Approximation." Many-Particle Aspects of Solid Surfaces" program of the Kavli Institute for Theoretical Physics, University of California, Santa Barbara. May 3. *(Conferences, Seminars and Symposiums: Conference Presentation)* 1983

Ma, C.Q. and V. Sahni. "Hartree-Fock Theory of Jellium Metal Surfaces." VIII Midwest Solid State Theory Symposium.at University of Indiana, Bloomington. Oct. 27-28. *(Conferences, Seminars and Symposiums: Conference Presentation)* 1980

Sahni, V. and J.P. Perdew. "Accurate and Easy Method for Work Function Calculations." *Bulletin of the American Physical Society* 24: 439. *(Conferences, Seminars and Symposiums: Conference Presentation)* 1979

"Application of Variational Principles for Single-particle Expectation Values to Atomic and Solid State Problems." Summer Conference on Theoretical Chemistry. University of Colorado, Boulder. June 23-27. *(Conferences, Seminars and Symposiums: Conference Presentation)* 1975

"Analytic Calculation of the Coherent Atomic Scattering Factor for the Isoelectronic Sequence." International Symposium on Atomic, Molecular and Solid State Theory. Sanibel Island, Fla., Jan. 16-22. *(Conferences, Seminars and Symposiums: Conference Presentation)* 1972

Sahni, V. and J.B. Krieger. "Calculation of Expectation Values Correct to Second Order Applied to the Ground State of the Helium Isoelectronic Sequence." International Symposium of Atomic, Molecular, Solid State Theory and Quantum Biology. Sanibel Island, Fla., Jan. 17-23. *(Conferences, Seminars and Symposiums: Conference Presentation)* 1971

### Professional Leadership

Director, Coordinated Engineering and Engineering Honors Program, 1988-present. The program constitutes the first two years of the baccalaureate degree awarded in the fields of chemical, civil, computer, electrical, environmental and mechanical engineering. A carefully articulated coordination with the engineering schools of Polytechnic University, City College and the College of Staten Island guarantees transfer to these institutions into the junior year. (Students also transferred to MIT, SUNY Stony Brook, University of Wisconsin, Cooper Union, Michigan State University, Purdue University and the University of California). In 2002, the engineering program was incorporated into the Honors Academy of Brooklyn College as the Engineering Honors Program. My responsibilities include orientation, advising, recruitment, open houses, financial aid and transfer officers to meet with our students, and to renegotiate the articulation as changes in engineering education occur. *(Professional Leadership: Committee Service)* 2008

### Other Professional Activities

Principal doctoral thesis adviser, for Dr. Xiao-Yin Pan, postdoctoral research associate of mine (2005-07); presently Professor, Department of Physics, Ningbo University, Ningbo, China. 2005

Doctoral Thesis Committee, for Mr. Y. Yang (Hunter College); defence: 2nd exam, December. 2003

Principal doctoral thesis adviser, for Dr. Zhixin Qian, postdoctoral research associate of Curator Professor of Physics G. Vignale; presently associate professor, Department of Physics, Peking University, Beijing. 2000

Principal doctoral thesis adviser, for Dr. Alexander Solomatin, presently at Lehman Brothers, New York. 1997

Principal doctoral thesis adviser, for Dr. Marlina Slamet, presently tenured associate professor of physics, Sacred Heart University, Fairfield, Conn. 1995

Doctoral Thesis Committee, for Dr. R. Rani (Queens College); defense: 1991. 1991

Doctoral Thesis Committee, for Dr. A. Mishra (City College); defense: September. 1990

Doctoral Thesis Committee, for Dr. N. Kamprath (Queens College); defense: March. 1990

Principal doctoral thesis adviser, for Dr. Manoj Kumar Harbola, postdoctoral research associate of Distinguished Professor R.G. Parr, presently Professor, Department of Physics, Indian Institute of Technology, Kanpur, India. 1990

Doctoral Thesis Committee, for Dr. Y. Li (Brooklyn College); defense: April. 1988

Doctoral Thesis Committee, for Dr. S. Das (City College); defense: 1987. 1987

Principal doctoral thesis adviser, for Dr. Abdel-Raouf Mohammed, assistant professor, Ain-Shams University, Cairo. 1985

Doctoral Thesis Committee, for Dr. P. Laufer (Brooklyn College); defense: August. 1984

Doctoral Thesis Committee, for Dr. S. Deonarine (City College); defense: December. 1984

Member, Doctoral Thesis Committee, for Dr. P.C. Das (City College); defense: September. 1982

Principal doctoral thesis adviser for Dr. Cheng-Quinn Ma, postdoctoral associate of Distinguished Professor Barry Cooper, then joined Bell Labs. 1979