QED second order corrections on the speed of light at low temperature

‎Razmi, M; Zamani, H

QED second order corrections on the speed of light at low temperature

Authors

M ‎Razmi

H Zamani

Abstract

We want to study thermal corrections on the speed of light at low temperature considering temperature dependence of photon vacuum polarization tensor at two-loop level in the standard QED‎. It is found that the heat bath behaves as a dispersive medium for the propagation of light and reduces its speed proportional to the second order of temperature‎. ‎Similarities and differences‎, ‎in light of already known calculations which are based on Euler-Heisenberg Lagrangian and/or those using temperature dependent electromagnetic properties of the medium are discussed‎.

Keywords

QED radiative corrections

finite temperature quantum field theory

the speed of light

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