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Quantum Liouville theory in the background field formalism I. Compact
Riemann surfaces
Quantum Liouville theory in the background field formalism I. Compact
Riemann surfaces
2005-08-25
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arxiv.org/abs/hep-th/0508188v2
Commun.Math.Phys. 268 (2006) 135-197
Physics
High Energy Physics
High Energy Physics - Theory
67 pages, 4 figures (Typos corrected as in the published version)
Scientific paper
10.1007/s00220-006-0091-4
Using Polyakov's functional integral approach with the Liouville action functional defined in \cite{ZT2} and \cite{LTT}, we formulate quantum Liouville theory on a compact Riemann surface X of genus g > 1. For the partition function and for the correlation functions with the stress-energy tensor components $<\prod_{i=1}^{n}T(z_{i})\prod_{k=1}^{l}\bar{T}(\w_{k})X>$, we describe Feynman rules in the background field formalism by expanding corresponding functional integrals around a classical solution - the hyperbolic metric on X. Extending analysis in \cite{LT1,LT2,LT-Varenna,LT3}, we define the regularization scheme for any choice of global coordinate on X, and for Schottky and quasi-Fuchsian global coordinates we rigorously prove that one- and two-point correlation functions satisfy conformal Ward identities in all orders of the perturbation theory. Obtained results are interpreted in terms of complex geometry of the projective line bundle $\cE_{c}=\lambda_{H}^{c/2}$ over the moduli space $\mathfrak{M}_{g}$, where c is the central charge and $\lambda_{H}$ is the Hodge line bundle, and provide Friedan-Shenker \cite{FS} complex geometry approach to CFT with the first non-trivial example besides rational models.
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Riemann surfaces does not yet have a rating.
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