Toward a systematic 1/d expansion: Two-particle properties

G. Zaránd, D. L. Cox, A. Schiller

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

We present a procedure to calculate 1/d corrections to two-particle properties around the infinite-dimensional dynamical mean-field limit. Our method is based on a modified version of the scheme of Schiller and Ingersent (Ref. 7), where the cancellation of overcounted diagrams is assured at each iteration step. We test our method on the half-filled Hubbard model using the fluctuation exchange approximation. To within numerical accuracy, we find stable, causal solutions for which 1/d corrections to the local correction are relatively small.

Original languageEnglish
Article numberR16227
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume62
Issue number24
DOIs
Publication statusPublished - Dec 15 2000

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Hubbard model
expansion
cancellation
iteration
diagrams
approximation

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Toward a systematic 1/d expansion : Two-particle properties. / Zaránd, G.; Cox, D. L.; Schiller, A.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 62, No. 24, R16227, 15.12.2000.

Research output: Contribution to journalArticle

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