Probabilistic construction of Toda conformal field theories. (Construction probabiliste des théories conformes des champs de Toda.) (English. French summary) Zbl 1516.60006
Summary: Following the 1984 seminal work of
A. A. Belavin et al. [Nucl. Phys., B 241, No. 2, 333–380 (1984; Zbl 0661.17013)] on two-dimensional conformal field theories, Toda conformal field theories were introduced in the physics literature as a family of two-dimensional conformal field theories that enjoy, in addition to conformal symmetry, an extended level of symmetry usually referred to as W-symmetry or higher-spin symmetry. More precisely Toda conformal field theories provide a natural way to associate to a finite-dimensional simple and complex Lie algebra a conformal field theory for which the algebra of symmetry contains the Virasoro algebra. In this document we use the path integral formulation of these models to provide a rigorous mathematical construction of Toda conformal field theories based on probability theory. By doing so we recover expected properties of the theory such as the Weyl anomaly formula with respect to the change of background metric by a conformal factor and the existence of Seiberg bounds for the correlation functions.
MSC:
| 60D05 | Geometric probability and stochastic geometry |
| 81T40 | Two-dimensional field theories, conformal field theories, etc. in quantum mechanics |
| 17B20 | Simple, semisimple, reductive (super)algebras |
| 17B68 | Virasoro and related algebras |
Keywords:
Gaussian free field; Gaussian multiplicative chaos; two-dimensional conformal field theory; random geometry; W-algebrasCitations:
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