Regensburg 2000 – scientific programme

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TT: Tiefe Temperaturen

TT 17: Postersitzung II: Pinning und Vortexdynamik (1-8), Supraleitung: Theorie (9-13), Korrelierte Elektronen (14-48), Niederdimensionale Systeme (49-68), Quantenflüssigkeiten (69-75)

TT 17.43: Poster

Wednesday, March 29, 2000, 14:30–18:00, A

Strong coupling perturbation theory for the Hubbard model — •Marc Zacher, Enrico Arrigoni, and Werner Hanke — Institut für Theoretische Physik Universität Würzburg

We extend exact diagonalization results for the Hubbard model on small clusters to the infinite lattice using perturbation theory. The calculated single-particle spectra are systematically compared with exact Quantum-Monte-Carlo results for different temperatures, fillings, and lattice sizes (of the original cluster).