INTEGRABLE VERSUS NONINTEGRABLE SPIN CHAIN IMPURITY MODELS

被引：42

作者：

SORENSEN, ES ^{[1
]}

EGGERT, S ^{[1
]}

AFFLECK, I ^{[1
]}

机构：

[1] UNIV BRITISH COLUMBIA,CANADIAN INST ADV RES,VANCOUVER V6T 1Z1,BC,CANADA

来源：

JOURNAL OF PHYSICS A-MATHEMATICAL AND GENERAL | 1993年 / 26卷 / 23期

关键词：

D O I：

10.1088/0305-4470/26/23/023

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Recent renormalization group studies of impurities in spin-1/2 chains appear to be inconsistent with Bethe ansatz results for a special integrable model. We study this system in more detail around the integrable point in parameter space and argue that this integrable impurity model corresponds to a non-generic multi-critical point. Using previous results on impurities in half-integer spin chains, a consistent renormalization group flow and phase diagram is proposed.

引用

页码：6757 / 6776

页数：20

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