QED EFFECTIVE ACTION AT FINITE-TEMPERATURE AND DENSITY

Authors
ELMFORS P PERSSON D SKAGERSTAM BS
Citation
P. Elmfors et al., QED EFFECTIVE ACTION AT FINITE-TEMPERATURE AND DENSITY, Physical review letters, 71(4), 1993, pp. 480-483
Citations number
14
Categorie Soggetti
Physics
Journal title
Physical review letters → ACNP
ISSN journal
00319007
Volume
71
Issue
4
Year of publication
1993
Pages
480 - 483
Database
ISI
SICI code
0031-9007(1993)71:4<480:QEAAFA>2.0.ZU;2-V
Abstract
The QED effective action at finite temperature and density is calculat ed to all orders in an external homogeneous and time-independent magne tic field, in the weak coupling limit. The free energy, obtained expli citly, exhibits the expected de Haas-van Alphen oscillations. An effec tive coupling at finite temperature and density is derived in a closed form and is compared with renormalization group results.