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The Classical approximation for real time scalar field theory at finite temperature

Aarts, Gert, Gert Aarts Orcid Logo

Swansea University Author: Gert Aarts Orcid Logo

Abstract

The use of classical thermal field to approximate real-time quantum thermal field theory is discussed. For a \lambda\phi^4 theory, it is shown that the classical Rayleigh-Jeans divergence can be canceled with the appropriate counterterms, and a comparison is made between the classical and quantum pe...

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Published: 1998
Online Access: http://inspirehep.net/record/476168
URI: https://cronfa.swan.ac.uk/Record/cronfa22624
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Abstract: The use of classical thermal field to approximate real-time quantum thermal field theory is discussed. For a \lambda\phi^4 theory, it is shown that the classical Rayleigh-Jeans divergence can be canceled with the appropriate counterterms, and a comparison is made between the classical and quantum perturbative expansion. It is explained why Hard Thermal Loops prevent the same method to work for gauge theories.
Item Description: @articleAarts:1998zt, author = "Aarts, Gert", title = "The Classical approximation for real time scalar field theory at finite temperature", year = "1998", eprint = "hep-ph/9809339", archivePrefix = "arXiv", primaryClass = "hep-ph", SLACcitation = "%%CITATION = HEP-PH/9809339;%%",
College: Faculty of Science and Engineering