Encontros Iberian Strings 

19/01/2021, 14:30 — 15:30 — Online
Thomas Mertens, Ghent University

JT gravity

Review lecture on JT gravity.

In this review talk, I will give an overview of several of the main developments in lower dimensional gravity (and in particular Jackiw-Teitelboim (JT) gravity) that have happened in the last couple of years. In particular, emphasis will be placed on the structure and solution of the model in terms of the Schwarzian wiggly curve and Riemann surface technology. At the semi-classical level, this model provides a concrete set-up for understanding some of the recent developments in the information paradox. At the quantum gravity level, higher topological corrections to amplitudes lead to features of discreteness of the underlying system and make contact with Maldacena's version of the information paradox. In particular, JT gravity itself can be written entirely as a matrix integral. We end with some discussions on how generic these lessons are, in particular for other models of quantum gravity.

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PresIberian.pdf