paper

Criticality in self-dual sine-Gordon models

arXiv:cond-mat/0203294 · doi:10.1016/S0550-3213(02)00474-1

Abstract

We discuss the nature of criticality in the self-dual extention of the sine-Gordon model. This field theory is related to the two-dimensional classical XY model with a N-fold degenerate symmetry-breaking field. We briefly overview the already studied cases and analyze in detail the case N=3 where a single phase transition in the three-state Potts universality class is expected to occur. The Z infrared critical properties of the self-dual sine-Gordon model are derived using two non-perturbative approaches. On one hand, we map the model onto an integrable deformation of the Z parafermion theory. The latter is known to flow to a massless Z infrared fixed point. Another route is based on the connection with a chirally asymmetric, su(2) su(2) Wess-Zumino-Novikov-Witten model with anisotropic current-current interaction, where we explore the existence of a decoupling (Toulouse) point.

26 pages, revised version

References in corpus (2)

Cited by in corpus (102)