Generalized Gibbs ensembles for time dependent processes

Philippe Chomaz; Francesca Gulminelli; Olivier Juillet

doi:10.1016/j.aop.2005.05.005

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arXiv · cond-mat/0412475

Generalized Gibbs ensembles for time dependent processes

Philippe Chomaz·Francesca Gulminelli·Olivier Juillet

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Abstract

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.

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Philippe Chomaz, Francesca Gulminelli, Olivier Juillet. 2004-12-17. Generalized Gibbs ensembles for time dependent processes. https://doi.org/10.1016/j.aop.2005.05.005

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