Edge magnetic field in the xxz spin-1/2 chain

被引：28

作者：

Affleck, I

机构：

[1] Univ British Columbia, Dept Phys & Astron, Vancouver, BC V6T 1Z1, Canada

[2] Univ British Columbia, Canadian Inst Adv Res, Vancouver, BC V6T 1Z1, Canada

来源：

JOURNAL OF PHYSICS A-MATHEMATICAL AND GENERAL | 1998年 / 31卷 / 12期

关键词：

D O I：

10.1088/0305-4470/31/12/003

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The critical behaviour associated with a transverse magnetic field applied at the edge of a semi-infinite xxz S = 1/2 chain is calculated using field theory techniques. Contrary to a recent claim, we find that the long-time behaviour is given by a renormalization group fixed point corresponding to an infinite field which polarizes the spin at the edge. The zero-temperature entropy and position-dependent magnetization are calculated.

引用

页码：2761 / 2766

页数：6

共 16 条

[11] Exact expectation values of local fields in the quantum sine-Gordon model [J].