Physics – Condensed Matter – Statistical Mechanics
Scientific paper
2007-05-18
Nucl. Phys. B 793, 396 (2008)
Physics
Condensed Matter
Statistical Mechanics
22 pages, 6 figures. v2: Nuclear Physics B Published version
Scientific paper
10.1016/j.nuclphysb.2007.09.029
The Schramm-Loewner evolution (SLE) describes the continuum limit of domain walls at phase transitions in two dimensional statistical systems. We consider here the SLEs in the self-dual Z(N) spin models at the critical point. For N=2 and N=3 these models correspond to the Ising and three-state Potts model. For N>5 the critical self-dual Z(N) spin models are described in the continuum limit by non-minimal conformal field theories with central charge c>=1. By studying the representations of the corresponding chiral algebra, we show that two particular operators satisfy a two level null vector condition which, for N>=4, presents an additional term coming from the extra symmetry currents action. For N=2,3 these operators correspond to the boundary conditions changing operators associated to the SLE_{16/3} (Ising model) and to the SLE_{24/5} and SLE_{10/3} (three-state Potts model). We suggest a definition of the interfaces within the Z(N) lattice models. The scaling limit of these interfaces is expected to be described at the self-dual critical point and for N>=4 by the SLE_{4(N+1)/(N+2)} and SLE_{4(N+2)/(N+1)} processes.
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