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Title
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Differential equation for the determination of a first-degree homogeneous noninteracting kinetic-energy density functional for two-level systems
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Author
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Abstract
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| A differential equation from which the noninteracting kinetic energy density of one-dimensional two-particle (or two-level spherically symmetric closed-shell) systems can be obtained in terms of the ground-state density is derived. In this equation, though non-linear, the kinetic energy density appears only through its various spatial derivatives. With a physically consistent generalization of the normalization constraint, the solution of the differential equation as a functional of the density,gives a first-degree homogeneous two-particle noninteracting kinetic-energy density functional, which can be considered as the second element of a series of first-degree homogeneous density functionals that give the exact noninteracting kinetic energy for densities of a given particle number, the first of which is the Weizsacker functional. (C) 2002 Elsevier Science B.V. All rights reserved. |
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Language
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English
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Source (journal)
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Physics letters : A. - Amsterdam, 1967, currens
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Publication
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Amsterdam
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North-Holland
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2002
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ISSN
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0375-9601
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DOI
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10.1016/S0375-9601(02)01141-6
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Volume/pages
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302
:2-3
(2002)
, p. 55-58
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ISI
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000178359500001
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Full text (Publisher's DOI)
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Full text (publisher's version - intranet only)
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