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Nonperturbative QED effective action at finite temperature

descriptionPublicationkeyboard_double_arrow_right Article , Preprint 26 Jul 2010Embargo end date: 01 Jan 2010Publisher:American Physical Society (APS)Journal:Physical Review D, volume 82 (issn: 1550-7998, eissn: 1550-2368,

Authors: Hyun Lee; Yongsung Yoon; Sang Pyo Kim;

doi: 10.1103/physrevd.82.025016 , 10.48550/arxiv.1006.0774

arXiv: http://arxiv.org/abs/1006.0774

Nonperturbative QED effective action at finite temperature

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Abstract

We advance a novel method for the finite-temperature effective action for nonequilibrium quantum fields and find the QED effective action in time-dependent electric fields, where charged pairs evolve out of equilibrium. The imaginary part of the effective action consists of thermal loops of the Fermi-Dirac or Bose-Einstein distribution for the initial thermal ensemble weighted with factors for vacuum fluctuations. And the real part of the effective action is determined by the mean number of produced pairs, vacuum polarization, and thermal distribution. The mean number of produced pairs is equal to twice the imaginary part. We explicitly find the finite-temperature effective action in a constant electric field.

RevTex4, 6pages, no figure; replaced by the version to be published in Phys. Rev. D

Related Organizations

Hanyang University
Korea (Republic of)
Kunsan National University
Korea (Republic of)
Asia Pacific Center for Theoretical Physics
Korea (Republic of)

Keywords

High Energy Physics - Theory, Nuclear Theory (nucl-th), High Energy Physics - Phenomenology, High Energy Physics - Phenomenology (hep-ph), Nuclear Theory, High Energy Physics - Theory (hep-th), FOS: Physical sciences, General Relativity and Quantum Cosmology (gr-qc), General Relativity and Quantum Cosmology

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