2 Conformal Field Theories of Stochastic Loewner Evolutions . [ CFTs of SLEs ]

Stochastic Loewner evolutions (SLEκ) are random growth processes of domains in the two dimensional upper half plane which represent critical clusters. We elaborate and developp a relation between SLEκ evolutions and conformal field theories (CFT) which is based on a group theoretical formulation of SLEκ processes and on the identification of the proper hull boundary states. This allows us to define an infinite set of SLEκ zero modes, or martingales, whose existence is a consequence of the existence of a null vector in the appropriate Virasoro modules. This identification leads, for instance, to linear systems for generalized crossing probabilities whose coefficients are multipoint CFT correlation functions. It provides a direct link between conformal correlation functions and probabilities of stopping time events in SLEκ evolutions. We point out a relation between SLEκ processes and two dimensional gravity and conjecture a reconstruction procedure of conformal field theories from SLEκ data. Email: [email protected] Member of the CNRS; email: [email protected]