SU(N) Self-Dual Sine-Gordon Model and Competing Orders

Details SU(N) Self-Dual Sine-Gordon Model and Competing Orders SU(N) Self-Dual Sine-Gordon Model and Competing Orders

2006-10-10

arxiv.org/abs/cond-mat/0610254v1

J.Stat.Mech.0612:L12001,2006

Physics

Condensed Matter

Statistical Mechanics

9 pages, using iopart.cls

Scientific paper

10.1088/1742-5468/2006/12/L12001

We investigate the low-energy properties of a generalized quantum sine-Gordon model in one dimension with a self-dual symmetry. This model describes a class of quantum phase transitions that stems from the competition of different orders. This SU(N) self-dual sine-Gordon model is shown to be equivalent to an SO(N)_2 conformal field theory perturbed by a current-current interaction, which is related to an integrable fermionic model introduced by Andrei and Destri. In the context of spin-chain problems, we give several realizations of this self-dual sine-Gordon model and discuss the universality class of the transitions.

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