Hubbard model: revisited—a macroscopic renormalization group study
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The spin-correlation length is used to set up a RG analysis of the Hubbard model (within RPA). We demonstrate that an identical critical behaviour is obtained by performing the macroscopic renormalization group analysis with the antisymmetric Landau interaction parameter. The beta functions for the half-filled and quarter-filled band cases have been evaluated.
KeywordsHubbard model macroscopic renormalization group beta function
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