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Gauge invariance of the beta-function in nonrelativistic quantum electrodynamics

Olav F. Syljuasen

cond-matarXiv:cond-mat/9608051

Abstract

Recently there has been much interest in gauge theories applied to condensed matter physics. I show that for a system of nonrelativistic electrons coupled to a U(1) gauge field in the presence of a Fermi surface, the beta-function to one-loop order is, for a particular family of gauge-choices, independent of the gauge-choice.

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