On the asymptotic behavior of effective QED at finite temperature
Departamento de Física e Química, Faculdade de Engenharia, Universidade Estadual Paulista, Campus da Guaratinguetá, Av. Dr. Ariberto Pereira da Cunha 333, 12500-000, Guaratinguetá, SP, Brazil
2 Instituto de Física Teórica, Universidade Estadual Paulista, 01405-900, São Paulo, Brazil
The aim of this paper is to study finite temperature effects in effective quantum electrodynamics using Weisskopf’s zero-point energy method in the context of thermo field dynamics. After a general calculation for a weak magnetic field at fixed T, the asymptotic behavior of the Euler-Kockel-Heisenberg Lagrangian density is investigated focusing on the regularization requirements in the high temperature limit. In scalar QED the same problem is also discussed.
© Springer-Verlag, 2003