Continuous-Time Quantum Monte Carlo Method for the Coqblin-Schrieffer Model

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dc.creatorOtsuki, J.
dc.creatorKusunose, H.
dc.creatorWerner, P.
dc.creatorKuramoto, Y.
dc.date2007-08-06
dc.date2007-08-07
dc.date.accessioned2026-07-07T08:38:16Z
dc.date.available2026-07-07T08:38:16Z
dc.descriptionAn impurity solver based on a continuous-time quantum Monte Carlo method is developed for the Coqblin-Schrieffer model. The Monte Carlo simulation does not encounter a sign problem for antiferromagnetic interactions, and accurately reproduces the Kondo effect. Our algorithm can deal with an arbitrary number N of local degrees of freedom, becomes more efficient for larger values of N, and is hence suitable for models with orbital degeneracy. The dynamical susceptibility and the impurity t-matrix are derived with the aid of the Padé approximation for various values of N, and good agreement is found with other methods and available exact results. We point out that the Korringa-Shiba relation needs correction for a finite value of the exchange interaction.
dc.description12 pages, 15 figures
dc.identifierhttps://arxiv.org/abs/0708.0718
dc.identifierhttp://arxiv.org/abs/0708.0718
dc.identifierJ. Phys. Soc. Jpn. 76 (2007) 114707
dc.identifierdoi:10.1143/JPSJ.76.114707
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/140669
dc.subjectStrongly Correlated Electrons
dc.titleContinuous-Time Quantum Monte Carlo Method for the Coqblin-Schrieffer Model
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