Functional renormalization group beyond
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Hirokazu Takashima; Ryotaro Arita; Kazuhiko Kuroki; Hideo Aoki
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Article
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2010
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Elsevier Science
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English
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While the functional renormalization group is a powerful theoretical method, the static approximation has been usually adopted in which the Matsubara frequency dependence of vertex functions is ignored. We propose a formalism beyond the static approximation with an efficient parameterization in the