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Particle production and effective thermalization in inhomogeneous mean field theory

Gert Aarts Orcid Logo, Jan Smit

Physical Review D, Volume: "D61", Issue: 2, Start page: 025002

Swansea University Author: Gert Aarts Orcid Logo

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DOI (Published version): 10.1103/PhysRevD.61.025002

Abstract

As a toy model for dynamics in nonequilibrium quantum field theory we consider the abelian Higgs model in 1+1 dimensions with fermions. In the approximate dynamical equations, inhomogeneous classical (mean) Bose fields are coupled to quantized fermion fields, which are treated with a mode function e...

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Published in: Physical Review D
ISSN: 0556-2821 1089-4918
Published: 1999
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URI: https://cronfa.swan.ac.uk/Record/cronfa22621
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Abstract: As a toy model for dynamics in nonequilibrium quantum field theory we consider the abelian Higgs model in 1+1 dimensions with fermions. In the approximate dynamical equations, inhomogeneous classical (mean) Bose fields are coupled to quantized fermion fields, which are treated with a mode function expansion. The effective equations of motion imply e.g. Coulomb scattering, due to the inhomogeneous gauge field. The equations are solved numerically. We define time dependent fermion particle numbers with the help of the single-time Wigner function and study particle production starting from inhomogeneous initial conditions. The particle numbers are compared with the Fermi-Dirac distribution parametrized by a time dependent temperature and chemical potential. We find that the fermions approximately thermalize locally in time.
Item Description: @articleAarts:1999zn, author = "Aarts, Gert and Smit, Jan", title = "Particle production and effective thermalization in inhomogeneous mean field theory", journal = "Phys.Rev.", volume = "D61", pages = "025002", doi = "10.1103/PhysRevD.61.025002", year = "2000", eprint = "hep-ph/9906538", archivePrefix = "arXiv", primaryClass = "hep-ph", reportNumber = "THU-99-16, ITFA-99-16", SLACcitation = "%%CITATION = HEP-PH/9906538;%%",
College: Faculty of Science and Engineering
Issue: 2
Start Page: 025002

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