SU(2)XSU(2)-INVARIANT SCATTERING MATRIX OF THE HUBBARD-MODEL

被引：48

作者：

ESSLER, FHL ^{[1
]}

KOREPIN, VE ^{[1
]}

机构：

[1] SUNY STONY BROOK,INST THEORET PHYS,STONY BROOK,NY 11794

来源：

NUCLEAR PHYSICS B | 1994年 / 426卷 / 03期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1016/0550-3213(94)90019-1

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

We consider the one-dimensional half-filled Hubbard model. We show that the excitation spectrum is given by the scattering states of four elementary excitations, which form the fundamental representation of SU(2) x SU(2). We determine the exact two-particle scattering matrix, which is a solution of the Yang-Baxter equation and reflects the SO(4) symmetry of the model. The results for the repulsive and attractive Hubbard model are related by an interchange of spin and charge degrees of freedom.

引用

页码：505 / 533

页数：29

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