On the choice of initial states in nonequilibrium dynamics

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Preprint

19 November 1997

preprint
Published by arXiv in arXiv

DOI:10.48550/arXiv.hep-th/9711144

Abstract

Imposing initial conditions to nonequilibrium systems at some time t_0 leads, in renormalized quantum field theory, to the appearance of singularities in the variable t-t_0 in relevant physical quantities, such as energy density and pressure. The origin of these `initial singularities' can be traced back to the choice of initial state. We construct here, by a Bogoliubov transformation, initial states such that these singularities are eliminated. While the construction is not unique it can be considered a minimal way of taking into account the nonequilibrium evolution of the system prior to t_0.

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Version 1, 1997-11-19, ArXiv
Published version: Physical Review D, 57 (10), 6398.

This publication has 1 reference indexed in Scilit:

Introduction to the Theory of Quantized Fields
Physics Today, 1960