Phys. Rev. D 72, 025014 (2005) [22 pages]Equilibration in φ4 theory in 3+1 dimensionsReceived 25 May 2005; published 28 July 2005 The process of equilibration in φ4 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 Φ-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(λ2). The approach to equilibrium, as well as the kinetic and chemical equilibration is investigated. © 2005 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevD.72.025014
DOI:
10.1103/PhysRevD.72.025014
PACS:
11.10.Wx, 05.60.−k, 25.75.−q
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