时间：2025年10月30日（星期四）下午15:30-17:00
地点：西湖大学云谷校区E10-212
主持人：理论科学研究院 刘洪光
主讲人：Frank Ferrari, Professor of theoretical physics and mathematics, Université Libre de Bruxelles (ULB)
主讲人简介：
Prof. Frank Ferrari was educated at the École Normale Supérieure of Paris. He held positions and long-term memberships in various institutions, including the École Normale Supérieure, CNRS, Princeton University, the Institute for Advanced Study in Princeton, the University of Neuchâtel in Switzerland and CERN. He is a professor of theoretical physics and mathematics at the Université Libre de Bruxelles (ULB) since 2004. He is on sabbatical in 2025/2026, spending the fall semester at the Institute for Advanced Study, Tsinghua University. His research covers several aspects of high energy theoretical physics, including quantum field theory, supersymmetric gauge theories, string theory, holography and quantum gravity. In recent years, he has focused on low dimensional quantum gravity models, in particular JT gravity, in relation with holography and SYK models, exploring the frontier with the mathematical fields of enumerative and random geometry, and probability theory.
报告题目：JT gravity on finite geometry: from finite cut-off holography to emerging time?
报告摘要：I will introduce a new type of boundary condition in JT gravity, that corresponds to studying the theory on finite geometries with a fluctuating boundary. This provides a completely new, microscopic, perspective on the model and opens up several avenues of research, the main points of which I will outline in my talk. In particular, I will describe a discretized formulation of the theory, corresponding to a new combinatorial problem in enumerative geometry, on which progress has been made very recently. I will also describe a purely continuum approach, making an unexpected link with Liouville theory techniques. The picture that emerges provides a novel formulation of the notion of finite cut-off in holography and suggests a model of emerging absolute boundary time.
