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
收藏
页码：6757 / 6776
页数：20
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