INTEGRABLE VERSUS NONINTEGRABLE SPIN CHAIN IMPURITY MODELS

Authors
SORENSEN ES EGGERT S AFFLECK I
Citation
Es. Sorensen et al., INTEGRABLE VERSUS NONINTEGRABLE SPIN CHAIN IMPURITY MODELS, Journal of physics. A, mathematical and general, 26(23), 1993, pp. 6757-6776
Citations number
18
Categorie Soggetti
Physics
Journal title
Journal of physics. A, mathematical and general → ACNP
ISSN journal
03054470
Volume
26
Issue
23
Year of publication
1993
Pages
6757 - 6776
Database
ISI
SICI code
0305-4470(1993)26:23<6757:IVNSCI>2.0.ZU;2-9
Abstract
Recent renormalization group studies of impurities in spin-1/2 chains appear to be inconsistent with Bethe ansatz results for a special inte grable model. We study this system in more detail around the integrabl e point in parameter space and argue that this integrable impurity mod el corresponds to a non-generic multi-critical point. Using previous r esults on impurities in half-integer spin chains, a consistent renorma lization group flow and phase diagram is proposed.