Spectral Properties of the One-Dimensional Hubbard Model

R. Preuss, A. Muramatsu, W. von der Linden, P. Dieterich, F. F. Assaad, W. Hanke

Research output: Contribution to journalArticle

Abstract

The spectral properties of the 1D Hubbard model are obtained from quantum Monte Carlo simulations on large systems (N=84) using the maximum entropy method. It is shown for the first time that the one-particle excitations are characterized by dispersive cosinelike bands, in extremely good agreement with slave-boson mean-field ones. Velocities for spin and charge excitations are obtained that lead to a conformal charge c=0.98±0.05. An exact sum rule for spin and charge excitations is fulfilled accurately with deviations of at most 10% only around 2kF.
Original languageEnglish
Pages (from-to)732
Number of pages1
JournalPhysical Review Letters
Volume73
Issue number5
DOIs
Publication statusPublished - 1994

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