Pair production beyond the Schwinger formula in time-dependent electric fields

被引：69
|
作者：
Hebenstreit, F. [1 ]
Alkofer, R. [1 ]
Gies, H. [2 ]
机构：
[1] Karl Franzens Univ Graz, Inst Phys, A-8010 Graz, Austria
[2] Univ Jena, Theoretisch Physikal Inst, D-07743 Jena, Germany
来源：
PHYSICAL REVIEW D | 2008年 / 78卷 / 06期
关键词：
D O I：
10.1103/PhysRevD.78.061701
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We investigate electron-positron pair production in pulse-shaped electric background fields using a non-Markovian quantum kinetic equation. We identify a pulse length range for subcritical fields still in the nonperturbative regime where the number of produced pairs significantly exceeds that of a naive expectation based on the Schwinger formula. From a conceptual viewpoint, we find a remarkable quantitative agreement between the ( real time) quantum kinetic approach and the ( imaginary time) effective action approach.
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页数：5
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