Thermal Effects in Low-Temperature QED
Abstract
QED is studied at low temperature (T m, where m is the electron mass) and zero chemical potential. By integrating out the electron field and the nonzero bosonic Matsubara modes, we construct an effective three-dimensional field theory that is valid at distances R1/T. As applications, we reproduce the ring-improved free energy and calculate the Debye mass to order e5.
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