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Applications of reflection amplitudes in Toda-type theories

Title
Applications of reflection amplitudes in Toda-type theories
Authors
Ahn C.Kim C.Rim C.
Ewha Authors
안창림
SCOPUS Author ID
안창림scopus
Issue Date
2001
Journal Title
Journal of Statistical Physics
ISSN
0022-4715JCR Link
Citation
vol. 102, no. 3-4, pp. 385 - 419
Indexed
SCI; SCIE; SCOPUS WOS scopus
Abstract
Reflection amplitudes are defined as two-point functions of certain class of conformal field theories where primary fields are given by vertex operators with real couplings. Among these, we consider (Super-) Liouville theory and simply and non-simply laced Toda theories. In this paper we show how to compute the scaling functions of effective central charge for the models perturbed by some primary fields which maintains integrability. This new derivation of the scaling functions are compared with the results from conventional TBA approach and confirms our approach along with other non-perturbative results such as exact expressions of the on-shell masses in terms of the parameters in the action, exact free energies. Another important application of the reflection amplitudes is a computation of one-point functions for the integrable models. Introducing functional relations between the one-point functions in terms of the reflection amplitudes, we obtain explicit expressions for simply-laced and non-simply-laced affine Toda theories. These nonperturbative results are confirmed numerically by comparing the free energies from the scaling functions with exact expressions we obtain from the one-point functions.
DOI
10.1023/A:1004826214195
Appears in Collections:
자연과학대학 > 물리학전공 > Journal papers
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