Journal
CHEMICAL PHYSICS LETTERS
Volume 593, Issue -, Pages 35-39Publisher
ELSEVIER
DOI: 10.1016/j.cplett.2013.12.071
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Funding
- Universidad de Buenos Aires, Argentina [UBA-CyT 20020100100197]
- Consejo Nacional de Investigaciones Cientificas y Tecnicas, Argentina [PIP 11220090100061]
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The energy of a physical domain within a molecular system considered as a quantum open system is analyzed as a functional of the electron distribution dependence with the number of particles. Our attention is focused upon the constrained-search functionals of the electron density, the 1- and 2-reduced density matrices (1-, 2-RDMs) for grand-canonical states. It is shown that functionals of the 2-RDM depend on the number of particles if the ground state energy is not a convex function of them. (C) 2014 Elsevier B.V. All rights reserved.
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