The one-dimensional Hubbard model with open ends: Universal divergent contributions to the magnetic susceptibility

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dc.creatorBortz, M.
dc.creatorSirker, J.
dc.date2006-02-22
dc.date2006-02-24
dc.date.accessioned2026-07-07T07:01:52Z
dc.date.available2026-07-07T07:01:52Z
dc.descriptionThe magnetic susceptibility of the one-dimensional Hubbard model with open boundary conditions at arbitrary filling is obtained from field theory at low temperatures and small magnetic fields, including leading and next-leading orders. Logarithmic contributions to the bulk part are identified as well as algebraic-logarithmic divergences in the boundary contribution. As a manifestation of spin-charge separation, the result for the boundary part at low energies turns out to be independent of filling and interaction strength and identical to the result for the Heisenberg model. For the bulk part at zero temperature, the scale in the logarithms is determined exactly from the Bethe ansatz. At finite temperature, the susceptibility profile as well as the Friedel oscillations in the magnetisation are obtained numerically from the density-matrix renormalisation group applied to transfer matrices. Agreement is found with an exact asymptotic expansion of the relevant correlation function.
dc.description30 pages, 8 figures, reference added
dc.identifierhttps://arxiv.org/abs/cond-mat/0602511
dc.identifierhttp://arxiv.org/abs/cond-mat/0602511
dc.identifierJ. Phys. A: Math. Gen. 39, 7187 (2006)
dc.identifierdoi:10.1088/0305-4470/39/23/002
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/108409
dc.subjectStrongly Correlated Electrons
dc.subjectStatistical Mechanics
dc.titleThe one-dimensional Hubbard model with open ends: Universal divergent contributions to the magnetic susceptibility
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