Duality and defects in rational conformal field theory

Details Duality and defects in rational conformal field theory Duality and defects in rational conformal field theory

2006-07-30

arxiv.org/abs/hep-th/0607247v2

Nucl.Phys.B763:354-430,2007

Physics

High Energy Physics

High Energy Physics - Theory

78 pages, several figures; v2: typos corrected and some references added

Scientific paper

10.1016/j.nuclphysb.2006.11.017

We study topological defect lines in two-dimensional rational conformal field theory. Continuous variation of the location of such a defect does not change the value of a correlator. Defects separating different phases of local CFTs with the same chiral symmetry are included in our discussion. We show how the resulting one-dimensional phase boundaries can be used to extract symmetries and order-disorder dualities of the CFT. The case of central charge c=4/5, for which there are two inequivalent world sheet phases corresponding to the tetra-critical Ising model and the critical three-states Potts model, is treated as an illustrative example.

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