Interaction flow method for many-fermion systems

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dc.creatorHonerkamp, Carsten
dc.creatorRohe, Daniel
dc.creatorAndergassen, Sabine
dc.creatorEnss, Tilman
dc.date2004-03-25
dc.date.accessioned2026-07-07T02:57:16Z
dc.date.available2026-07-07T02:57:16Z
dc.descriptionWe propose an interaction flow scheme that sums up the perturbation expansion of many-particle systems by successively increasing the interaction strength. It combines the unbiasedness of renormalization group methods with the simplicity of straight-forward perturbation theory. Applying the scheme to fermions in one dimension and to the two-dimensional Hubbard model we find that at one-loop level and low temperatures there is ample agreement with previous one-loop renormalization group approaches. We furthermore present results for the momentum-dependence of spin, charge and pairing interactions in the two-dimensional Hubbard model.
dc.description14 pages, 14 figures
dc.identifierhttps://arxiv.org/abs/cond-mat/0403633
dc.identifierhttp://arxiv.org/abs/cond-mat/0403633
dc.identifierPhys. Rev. B 70, 235115 (2004)
dc.identifierdoi:10.1103/PhysRevB.70.235115
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/23597
dc.subjectStrongly Correlated Electrons
dc.subjectSuperconductivity
dc.titleInteraction flow method for many-fermion systems
dc.typetext

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