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Equilibration in phi^4 theory in 3+1 dimensions

Alejandro Arrizabalaga·Jan Smit·Anders Tranberg
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Abstract

The process of equilibration in phi^4 theory is investigated for a homogeneous system in 3+1 dimensions and a variety of out-of-equilibrium initial conditions, both in the symmetric and broken phase, by means of the 2PI effective action. Two Phi-derivable approximations including scattering effects are used: the two-loop and the ``basketball'', the latter corresponding to the truncation of the 2PI effective action at O(lambda^2). The approach to equilibrium, as well as the kinetic and chemical equilibration is investigated.

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Alejandro Arrizabalaga, Jan Smit, Anders Tranberg. 2005-12-07. Equilibration in phi^4 theory in 3+1 dimensions. https://doi.org/10.1103/physrevd.72.025014

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