Conserving Approximations in Time-Dependent Density Functional Theory

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dc.creatorvon Barth, Ulf
dc.creatorDahlen, Nils Erik
dc.creatorvan Leeuwen, Robert
dc.creatorStefanucci, Gianluca
dc.date2005-07-26
dc.date2005-12-17
dc.date.accessioned2026-07-07T06:41:26Z
dc.date.available2026-07-07T06:41:26Z
dc.descriptionIn the present work we propose a theory for obtaining successively better approximations to the linear response functions of time-dependent density or current-density functional theory. The new technique is based on the variational approach to many-body perturbation theory (MBPT) as developed during the sixties and later expanded by us in the mid nineties. Due to this feature the resulting response functions obey a large number of conservation laws such as particle and momentum conservation and sum rules. The quality of the obtained results is governed by the physical processes built in through MBPT but also by the choice of variational expressions. We here present several conserving response functions of different sophistication to be used in the calculation of the optical response of solids and nano-scale systems.
dc.description11 pages, 4 figures, revised version
dc.identifierhttps://arxiv.org/abs/cond-mat/0507604
dc.identifierhttp://arxiv.org/abs/cond-mat/0507604
dc.identifierPhys. Rev. B 72, 235109 (2005)
dc.identifierdoi:10.1103/PhysRevB.72.235109
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/101666
dc.subjectStatistical Mechanics
dc.subjectMesoscale and Nanoscale Physics
dc.titleConserving Approximations in Time-Dependent Density Functional Theory
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