Real-time thermal propagators and the QED effective action for an external magnetic field

被引：59

作者：

Elmfors, Per ^{[1
]}

Persson, David ^{[2
]}

Skagerstam, Bo-Sture ^{[3
]}

机构：

[1] NORDITA, DK-2100 Copenhagen, Denmark

[2] Chalmers Univ Technol, Inst Theoret Phys, S-41296 Gothenburg, Sweden

[3] Univ Kalmar, S-39129 Kalmar, Sweden

来源：

ASTROPARTICLE PHYSICS | 1994年 / 2卷 / 03期

关键词：

D O I：

10.1016/0927-6505(94)90008-6

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The thermal averaged real-time propagator of a Dirac ferrnion in a static uniform magnetic field B is derived. At non-zero chemical potential and temperature we find explicitly the effective action for the magnetic field, which is shown to be closely related to the Helmholtz free energy of a relativistic fermion gas, and it exhibits the expected de Haas-van Alphen oscillations. An effective QED coupling constant at finite temperature and density is derived, and compared with renormalization group results. We discuss some astrophysical implications of our results.

引用

页码：299 / 325

页数：27

共 46 条

[1]

Abrikosov A. A., 1988, FUNDAMENTALS THEORY

[2] PHOTON SPLITTING IN A STRONG MAGNETIC FIELD [J].