Speaker: Frank Ferrari (Université Libre de Bruxelles)
Time: 2025-12-03 16:00-18:00
Location: 1710, SIMIS
Zoom Meeting ID: 840 4053 9214 Passcode: 393691
Abstract:
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 fully quantum formulation of the notion of finite cut-off in holography, making a link with old ideas based of end-of-the-world Randall-Sundrum branes, and suggesting a model of emerging absolute boundary time.
About Speaker:
Frank Ferrari is a Professor of Theoretical Physics at Université Libre de Bruxelles and the International Solvay Institute in Brussels. He completed his PhD in 1997 at Ecole Normale Superieure. Prior to achieving tenure, he held postdoctoral positions at Princeton University, and Neuchatel University. His research is mostly centered around quantum theory of fields, strings and gravity. Specifically, on quantum theory of black holes, SYK models, tensor and matrix-tensor models, Jackiw-Teitelboim gravity.
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