Point splitting renormalization of Schwinger induced current in de Sitter spacetime

被引：30
作者：
Hayashinaka, Takahiro [1 ,2 ]
Yokoyama, Jun'ichi [1 ,2 ,3 ]
机构：
[1] Univ Tokyo, Res Ctr Early Universe RESCEU, Grad Sch Sci, Bunkyo Ku, Tokyo, Japan
[2] Univ Tokyo, Grad Sch Sci, Dept Phys, Bunkyo Ku, Tokyo 1130033, Japan
[3] Univ Tokyo, WPI, UTIAS, Kavli Inst Phys & Math Universe, Kashiwa, Chiba 2778583, Japan
来源：
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS | 2016年 / 07期
关键词：
physics of the early universe; quantum cosmology; inflation; primordial magnetic fields; INTERGALACTIC MAGNETIC-FIELDS; INFLATION; LIGHT;
D O I：
10.1088/1475-7516/2016/07/012
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
The covariant and gauge invariant calculation of the current expectation value in the homogeneous electric field in 1+3 dimensional de Sitter spacetime is shown. The result accords with previous work obtained by using adiabatic subtraction scheme. We therefore conclude the counterintuitive behaviors of the current in the infrared (IR) regime such as IR hyperconductivity and negative current are not artifacts of the renormalization scheme, but are real IR effects of the spacetime.
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页数：13
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