Interpolative Approach for Solving Quantum Impurity Model Based on the Slave--Boson Mean--Field Approximation

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dc.creatorOudovenko, V.
dc.creatorHaule, K.
dc.creatorSavrasov, S. Y.
dc.creatorVillani, D.
dc.creatorKotliar, G.
dc.date2004-01-27
dc.date.accessioned2026-07-07T02:56:06Z
dc.date.available2026-07-07T02:56:06Z
dc.descriptionA rational representation for the self-energy is explored to interpolate the solution of the Anderson impurity model in general orbitally degenerate case. Several constrains such as the Friedel's sum rule, high--frequency moments and the value of quasiparticle residue are used to establish the equations for the coefficients of the interpolation. We test two fast techniques, the slave--boson mean--field and the Hubbard I approximation to determine the coefficients. The obtained self--energies are compared with the results of numerically exact Quantum Monte Carlo method. We find that using the slave--boson mean--field approach we can construct an accurate self--energy for all frequencies via the proposed interpolation procedure.
dc.description11 revtex pages, 6 eps figures
dc.identifierhttps://arxiv.org/abs/cond-mat/0401539
dc.identifierhttp://arxiv.org/abs/cond-mat/0401539
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/23194
dc.subjectStrongly Correlated Electrons
dc.subjectMaterials Science
dc.titleInterpolative Approach for Solving Quantum Impurity Model Based on the Slave--Boson Mean--Field Approximation
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