Breit-Wigner width and participation ratio in finite interacting Fermi systems
Condensed Matter
2009-10-30 v1
Abstract
For many-body Fermi systems we determine the dependence of the Breit-Wigner width and inverse participation ratio (IPR) on interaction strength U > Uc and energy excitation dE > dE_ch when a crossover from Poisson to Wigner-Dyson P(s)-statistics takes place. At U > Uc the eigenstates are composed of a large number of noninteracting states and even for U < Uc there is a regime where P(s) is close to the Poisson distribution but IPR >> 1.
Keywords
Cite
@article{arxiv.cond-mat/9707231,
title = {Breit-Wigner width and participation ratio in finite interacting Fermi systems},
author = {Bertrand Georgeot and Dima L. Shepelyansky},
journal= {arXiv preprint arXiv:cond-mat/9707231},
year = {2009}
}
Comments
revtex, 4 pages, 4 figures