upsilon-representability of one-body density matrices - art. no. 042512

Authors
Van Neck, D Waroquier, M Peirs, K Van Speybroeck, V Dewulf, Y
Citation
D. Van Neck et al., upsilon-representability of one-body density matrices - art. no. 042512, PHYS REV A, 6404(4), 2001, pp. 2512
Citations number
17
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW A
ISSN journal
10502947 → ACNP
Volume
6404
Issue
4
Year of publication
2001
Database
ISI
SICI code
1050-2947(200110)6404:4<2512:UOODM->2.0.ZU;2-Z
Abstract
We consider low-dimensional model systems with a fixed two-body interaction and a variable (nonlocal) one-body potential. It is shown explicitly that an extended domain of allowed (N-representable) one-body density matrices c annot be generated in this way, the excluded domain depending on the two-bo dy interaction under consideration. This stands in contrast to the behavior of the diagonal part of the density matrix.