Efficient Fermionic One-Loop RG for the 2D Hubbard Model at Van Hove Filling

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dc.creatorHusemann, Christoph
dc.creatorSalmhofer, Manfred
dc.date2009-02-10
dc.date.accessioned2026-07-07T12:39:53Z
dc.date.available2026-07-07T12:39:53Z
dc.descriptionWe propose a novel parametrization of the four-point vertex function in the one-loop one-particle irreducible renormalization group (RG) scheme for fermions. It is based on a decomposition of the effective two-fermion interaction into fermion bilinears that interact via exchange bosons. Besides being more efficient than previous N-patch schemes, this parametrization also reduces the ambiguity of introducing boson fields. We apply this parametrization to the two-dimensional (t,t')-Hubbard model using a novel $Ω$-frequency regularization.
dc.description4 pages, 2 figures
dc.identifierhttps://arxiv.org/abs/0902.1651
dc.identifierhttp://arxiv.org/abs/0902.1651
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/219275
dc.subjectStrongly Correlated Electrons
dc.titleEfficient Fermionic One-Loop RG for the 2D Hubbard Model at Van Hove Filling
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