Integrable versus Non-Integrable Spin Chain Impurity Models
凝聚态物理
2009-10-22 v1
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
@article{arxiv.cond-mat/9306003,
title = {Integrable versus Non-Integrable Spin Chain Impurity Models},
author = {E. S. Sorensen and S. Eggert and I. Affleck},
journal= {arXiv preprint arXiv:cond-mat/9306003},
year = {2009}
}
备注
20 pages 11 figures obtainable from authors, REVTEX 3.0