Nonequilibrium Green's function approach to the pair distribution function of quantum many-body systems out of equilibrium
Strongly Correlated Electrons
2013-09-19 v1
Abstract
The pair distribution function (PDF) is a key quantity for the analysis of correlation effects of a quantum system both in equilibrium and far from equilibrium. We derive an expression for the PDF in terms of the single-particle Green's functions---the solutions of the Keldysh/Kadanoff-Baym equations in the two-time plane---for a one- or two-component system. The result includes initial correlations and generalizes previous density matrix expressions from single-time quantum kinetic theory. Explicit expressions for the PDF are obtained in second Born approximation.
Keywords
Cite
@article{arxiv.1211.0209,
title = {Nonequilibrium Green's function approach to the pair distribution function of quantum many-body systems out of equilibrium},
author = {M. Bonitz and S. Hermanns and K. Kobusch and K. Balzer},
journal= {arXiv preprint arXiv:1211.0209},
year = {2013}
}