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Titolo:
Boundary flows in general coset theories
Autore:
Ahn, C; Rim, C;
Indirizzi:
Free Univ Berlin, Inst Theoret Phys, D-14195 Berlin, Germany Free Univ Berlin Berlin Germany D-14195 et Phys, D-14195 Berlin, Germany Chonbuk Natl Univ, Dept Phys, Chonju 561756, South Korea Chonbuk Natl Univ Chonju South Korea 561756 , Chonju 561756, South Korea Ewha Womans Univ, Dept Phys, Seoul 120750, South Korea Ewha Womans Univ Seoul South Korea 120750 hys, Seoul 120750, South Korea
Titolo Testata:
JOURNAL OF PHYSICS A-MATHEMATICAL AND GENERAL
fascicolo: 13, volume: 32, anno: 1999,
pagine: 2509 - 2525
SICI:
0305-4470(19990402)32:13<2509:BFIGCT>2.0.ZU;2-S
Fonte:
ISI
Lingua:
ENG
Soggetto:
LOCAL HEIGHT PROBABILITIES; THERMODYNAMIC BETHE ANSATZ; CONFORMAL FIELD-THEORY; FACTORIZED SCATTERING; VIRASORO ALGEBRAS; STAIRCASE MODELS; QUANTUM-SYSTEMS; 2 DIMENSIONS; INVARIANCE; GORDON;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
45
Recensione:
Indirizzi per estratti:
Indirizzo: Ahn, C Free Univ Berlin, Inst Theoret Phys, Arnimallee 14, D-14195 Berlin,Germany Free Univ Berlin Arnimallee 14 Berlin Germany D-14195 lin, Germany
Citazione:
C. Ahn e C. Rim, "Boundary flows in general coset theories", J PHYS A, 32(13), 1999, pp. 2509-2525

Abstract

In this paper we study the boundary effects for off-critical integrable field theories which have close analogues with integrable lattice models. Ourmodels are the SU(2)(k) x SU(2)(l)/SU(2)(k+l) coset conformal field theories perturbed by an integrable boundary and bulk operators. The boundary interactions are encoded into the boundary reflection matrix. Using the thermodynamic Bethe ansatz (TBA) method, we verify the flows of the conformal BCsby computing the boundary entropies. These flows of the BCs have direct interpretations for the fusion restricted solid-on-solid (RSOS) lattice models. For super conformal field theories (CFTs) (k = 2) we show that these flows are possible only for the Neveu-Schwarz sector and are consistent with the lattice results. The models we consider cover a wide class of integrablemodels. In particular, we show how the impurity spin is screened by electrons for the k-channel Kondo model by taking the I --> infinity limit. We also study the problem using an independent method based on the boundary roaming TEA. Our numerical results are consistent with the boundary CFTs and RSOS TEA analysis.

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Documento generato il 29/03/20 alle ore 09:14:01