SPECTRAL PROPERTIES OF THE ONE-DIMENSIONAL HUBBARD-MODEL

被引：78

作者：

PREUSS, R

MURAMATSU, A

VONDERLINDEN, W

DIETERICH, P

ASSAAD, FF

HANKE, W

机构：

[1] Physikalisches Institut, Universität Würzburg, D-97074 Würzberg, Am Hubland

来源：

PHYSICAL REVIEW LETTERS | 1994年 / 73卷 / 05期

关键词：

D O I：

10.1103/PhysRevLett.73.732

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

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 2k(F).

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页码：732 / 735

页数：4

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