Berry Phases with Real Hamiltonians With and Without a Many-body System as a Background
Quantum Physics
2008-02-03 v2 Condensed Matter
Abstract
We present both the gauge theoretic description and the numerical calculations of the Berry phases with the real eigenstates, involving one with a many-body system as a background and the other with no such background. We demonstrate that for the former the sign of the Berry phase factor for a spin particle (hole) coupled to a slow subsystem (phonon) depends on both the strength of electron correlations and the characteristics of the closed paths, unlike the cases for the latter.
Cite
@article{arxiv.quant-ph/9605040,
title = {Berry Phases with Real Hamiltonians With and Without a Many-body System as a Background},
author = {S. P. Hong and H. Doh and S. H. Suck Salk},
journal= {arXiv preprint arXiv:quant-ph/9605040},
year = {2008}
}
Comments
4 pages RevTex, uses epsf,twocolumn, 3 embedded postscript figures, submitted to PRL, acknowledgement appended