Identity for the second functional derivative of the density functional Hartree plus exchange-correlation functional

Published 25 Aug 2011 in cond-mat.mtrl-sci | (1108.5072v1)

Abstract: It is shown that the integral of the product of the charge density difference of the N- and (N-1)-electron densities of the same Hamiltonian and the second functional derivative of the Hartree plus exchange-correlation functional of the N-electron density is equal to a constant.

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Daniel P. Joubert

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