Geometrical Properties of Cumulant Expansions
| dc.creator | Kladko, K. | |
| dc.creator | Fulde, P. | |
| dc.date | 1997-09-04 | |
| dc.date.accessioned | 2026-07-07T03:09:10Z | |
| dc.date.available | 2026-07-07T03:09:10Z | |
| dc.description | Cumulants represent a natural language for expressing macroscopic properties of a solid. We show that cumulants are subject to a nontrivial geometry. This geometry provides an intuitive understanding of a number of cumulant relations which had been obtained so far by using algebraic considerations. We give general expressions for their infinitesimal and finite transformations and represent a cumulant wave operator through an integration over a path in the Hilbert space. Cases are investigated where this integration can be done exactly. An expression of the ground-state wavefunction in terms of the cumulant wave operator is derived. In the second part of the article we derive the cumulant counterpart of Faddeev`s equations and show its connection to the method of increments. | |
| dc.description | 28 pages, Revtex | |
| dc.identifier | https://arxiv.org/abs/cond-mat/9709044 | |
| dc.identifier | http://arxiv.org/abs/cond-mat/9709044 | |
| dc.identifier | INTERNATIONAL JOURNAL OF QUANTUM CHEMISTRY,v.66(#5),377-389 FEB 15,1998 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/27782 | |
| dc.subject | Condensed Matter | |
| dc.title | Geometrical Properties of Cumulant Expansions | |
| dc.type | text |