NEW INTEGRABLE QUANTUM CHAINS COMBINING DIFFERENT KINDS OF SPINS

被引：90

作者：

DEVEGA, HJ ^{[1
]}

WOYNAROVICH, F ^{[1
]}

机构：

[1] HUNGARIAN ACAD SCI,CENT RES INST PHYS,H-1525 BUDAPEST,HUNGARY

来源：

JOURNAL OF PHYSICS A-MATHEMATICAL AND GENERAL | 1992年 / 25卷 / 17期

关键词：

D O I：

10.1088/0305-4470/25/17/012

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A general procedure to generate new integrable Hamiltonians combining any kind of spins distributed arbitrarily on the line is given. As a concrete application, anisotropic chains formed by spin-1/2 and spin-1 operators at alternating sites are presented and solved exactly by Bethe ansatz (BA). We compute the ground-state and excitation energies and momentum. The higher-order BA equations are derived. Depending on our choice, these new Hamiltonians exhibit or not conformal invariance in their low energy spectrum.

引用

页码：4499 / 4516

页数：18

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