Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2007-10-21
J.Phys.A41:164046,2008
Physics
High Energy Physics
High Energy Physics - Theory
7 pages, Talk presented at Workshop "Quantum Field Theory under the Influence of External Conditions", Leipzig, September 17-2
Scientific paper
10.1088/1751-8113/41/16/164046
The mean value of the one-loop energy-momentum tensor in thermal QED with electric-like background that creates particles from vacuum is calculated. The problem differes essentially from calculations of effective actions (similar to that of Heisenberg--Euler) in backgrounds that do not violate the stability of vacuum. The role of a constant electric background in the violation of both the stability of vacuum and the thermal character of particle distribution is investigated. Restrictions on the electric field and its duration under which one can neglect the back-reaction of created particles are established.
Gavrilov Sergey P.
Gitman Dmitri M.
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