Generalized Gibbs ensembles for time dependent processes
统计力学
2007-05-23 v1 核理论
摘要
An information theory description of finite systems explicitly evolving in time is presented for classical as well as quantum mechanics. We impose a variational principle on the Shannon entropy at a given time while the constraints are set at a former time. The resulting density matrix deviates from the Boltzmann kernel and contains explicit time odd components which can be interpreted as collective flows. Applications include quantum brownian motion, linear response theory, out of equilibrium situations for which the relevant information is collected within different time scales before entropy saturation, and the dynamics of the expansion.
引用
@article{arxiv.cond-mat/0412475,
title = {Generalized Gibbs ensembles for time dependent processes},
author = {Philippe Chomaz and Francesca Gulminelli and Olivier Juillet},
journal= {arXiv preprint arXiv:cond-mat/0412475},
year = {2007}
}