Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2001-03-27
Phys.Rev. D65 (2002) 025014
Physics
High Energy Physics
High Energy Physics - Phenomenology
20 pages, 4 figures, revtex
Scientific paper
10.1103/PhysRevD.65.025014
QED is studied at low temperature ($T\ll m$, 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 $R\gg1/T$. As applications, we reproduce the ring-improved free energy and calculate the Debye mass to order $e^5$.
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