Singular structure of the QED effective action

被引:1
作者
Fayzullaev, B. A. [1 ]
机构
[1] Natl Univ Uzbekistan, Dept Theoret Phys, Univ St 4, Tashkent 100174, Uzbekistan
来源
PROCEEDINGS OF THE INTERNATIONAL WORKSHOP NEW ASPECTS OF THE HADRON AND ASTRO/NUCLEAR PHYSICS | 2019年 / 49卷
关键词
Quantum electrodynamics; effective action; singular perturbation expansion; vacuum expectations;
D O I
10.1142/S2010194519600061
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
The equations for the QED effective action derived in Ref. 3 are considered using singular perturbation theory. The effective action is divided into regular and singular (in coupling constant) parts. It is shown that expression for the regular part coincides with usual Feynman perturbation series over coupling constant, while the remainder has essential singularity at the vanishing coupling constant: e -> 0. This means that in the frame of quantum field theory it is impossible "to switch off" electromagnetic interaction in general and pass on to "free electron".
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页数:9
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