RG flow in 2d field theory coupled to gravity

Details RG flow in 2d field theory coupled to gravity RG flow in 2d field theory coupled to gravity

1994-12-06

arxiv.org/abs/hep-th/9412051v2

Proc. of XXVIII Int. Symp. on the Theory of Elementary Particles in Wendisch-Rietz, Aug. 30 - Sep. 4, 1994, ed. D. Luest and G

Physics

High Energy Physics

High Energy Physics - Theory

minor change in references

Scientific paper

The renormalization group flow in two--dimensional field theories is modified if they are coupled to gravity. Beta function coefficients are changed, the $c$--theorem is no longer strictly valid, and flows from fixed points with central charge $c>25$ to fixed points with $c<25$ are forbidden. This is discussed in general and at two examples, the Kosterlitz--Thouless phase transition and the Wess--Zumino--Witten model. A possible application to string cosmology is pointed out.

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