Circular loop operators in conformal field theories

Details Circular loop operators in conformal field theories Circular loop operators in conformal field theories

2005-12-13

arxiv.org/abs/hep-th/0512150v1

Phys.Rev.D74:046002,2006

Physics

High Energy Physics

High Energy Physics - Theory

10 pages, latex

Scientific paper

10.1103/PhysRevD.74.046002

We use the conformal group to study non-local operators in conformal field theories. A plane or a sphere (of any dimension) is mapped to itself by some subgroup of the conformal group, hence operators confined to that submanifold may be classified in representations of this subgroup. For local operators this gives the usual definition of conformal dimension and spin, but some conformal field theories contain interesting nonlocal operators, like Wilson or 't Hooft loops. We apply those ideas to Wilson loops in four-dimensional CFTs and show how they can be chosen to be in fixed representations of SL(2,R) x SO(3).

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