HECAP Seminar: The quantum extropy of extremal black holes and the Schwarzian theory (6 October 2022)

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HECAP Seminar: The quantum extropy of extremal black holes and the Schwarzian theory

Starts 6 Oct 2022 16:00

Ends 6 Oct 2022 18:00

Central European Time

Zoom Meeting + in presence

Leonardo Building - Euler Lecture Hall

Join Zoom Meeting: 

https://zoom.us/j/92814960163

Meeting ID: 928 1496 0163

Passcode: 010010

Abstract. I will revisit the quantum entropy of extremal black holes which is defined as a path integral in the near-horizon AdS2 region. This has been studied in the past using different methods: loop calculations give rise to leading logarithmic corrections to the area law, and localization gives rise to a sum over all perturbative corrections.

The new development has to do with the exact treatment of the zero-modes that appear in the near-horizon region, which can be described by the Schwarzian action at small temperatures. I will show how this allows us to (1) calculate the non-perturbative effects in the localization calculation, so as to get integers degeneracies out of gravity, and (2) control the zero-temperature limit properly for extremal (not necessarily supersymmetric) black holes, leading to new logarithmic effects.

It will be an informal blackboard talk based on the papers:

https://arxiv.org/abs/2209.13608

https://arxiv.org/abs/2209.13602