Volume 14, Issue 3 (Iranian Journal of Physics Research,Fall 2014)                   IJPR 2014, 14(3): 85-88 | Back to browse issues page

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Department of Physics‎, University of Qom, Qom, Iran , razmi@qom.ac.ir
Abstract:   (3782 Views)
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.
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Type of Study: Research | Subject: General