Scaling Lee-Yang Model on a Sphere. I. Partition Function

Details Scaling Lee-Yang Model on a Sphere. I. Partition Function Scaling Lee-Yang Model on a Sphere. I. Partition Function

2001-09-09

arxiv.org/abs/hep-th/0109078v1

JHEP 0207 (2002) 029

Physics

High Energy Physics

High Energy Physics - Theory

Extended version of a talk presented at the NATO Advanced Research Workshop on Statistical Field Theories, Como 18--23 June 20

Scientific paper

10.1088/1126-6708/2002/07/029

Some general properties of perturbed (rational) CFT in the background metric of symmetric 2D sphere of radius $R$ are discussed, including conformal perturbation theory for the partition function and the large $R$ asymptotic. The truncated conformal space scheme is adopted to treat numerically perturbed rational CFT's in the spherical background. Numerical results obtained for the scaling Lee-Yang model lead to the conclusion that the partition function is an entire function of the coupling constant. Exploiting this analytic structure we are able to describe rather precisely the ``experimental'' truncated space data, including even the large $R$ behavior, starting only with the CFT information and few first terms of conformal perturbation theory.

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