Integrable perturbations of CFT with complex parameter: the M_3/5 model and its generalizations

1994/11/11 by F. Ravanini, F. RAVANINI, Francesco Ravanini +5 · 1 citation
Physics and Astronomy · #Theoretical and Computational Physics #hep-th

paper · pdf · doi:10.1142/s0217751x96000304

published as Int.J.Mod.Phys. A11 (1996) 677-698 · 30p, LaTeX, 2 postscript figs (embedable into text with epsfig.sty)

arxiv created 1994/11/11 · arxiv updated 2015/06/26

Abstract

We give evidence, by use of the Thermodynamic Bethe Ansatz approach, of the existence of both massive and massless behaviours for the ϕ_2,1 perturbation of the M_3,5 non-unitary minimal model, thus resolving apparent contradictions in the previous literature. The two behaviours correspond to changing the perturbing bare coupling constant from real values to imaginary ones. Generalizations of this picture to the whole class of non-unitary minimal models M_{p,2p± 1}, perturbed by their least relevant operator lead to a cascade of flows similar to that of unitary minimal models perturbed by ϕ_1,3. Various aspects and generalizations of this phenomenon and the links with the Izergin-Korepin model are discussed.

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