Thermal Operator and Dispersion Relation in QED at Finite Temperature and Chemical Potential

Abstract

Combining the thermal operator representation with the dispersion relation in QED at finite temperature and chemical potential, we determine the complete retarded photon self-energy only from its absorptive part at zero temperature. As an application of this method, we show that, even for the case of a nonzero chemical potential, the temperature dependent part of the one loop retarded photon self-energy vanishes in $(1+1)$ dimensional massless QED.

5 pages, revtex

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Cited by in corpus (1)

• Bogoliubov transformation and the thermal operator representation in the real time formalism