Liouville quantum gravity on the Riemann sphere

by Prof. Vincent VARGAS (CNRS, ENS Paris)

Tuesday Dec 9, 2014, 4:00 PM → 5:00 PM Europe/Paris

Centre de conférences Marilyn et James Simons (I.H.E.S.)

In this talk, I will present a rigorous probabilistic construction of Liouville Field Theory on the Riemann sphere with positive cosmological constant, as considered by Polyakov in his 1981 seminal work "Quantum geometry of bosonic strings". Then, I will explain some of the fundamental properties of the theory like conformal covariance under PSL$_2(\C)$-action, Seiberg bounds, KPZ scaling laws, the KPZ formula and the Weyl anomaly (Polyakov-Ray-Singer) formula. If time permits, I will also explain the construction in the disk. This is based on joint works (some on arxiv and others in progress) with F. David, Y. Huang, A. Kupiainen, R. Rhodes.