Research Seminars @ Illinois

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Tailored for undergraduate researchers, this calendar is a curated list of research seminars at the University of Illinois. Explore the diverse world of research and expand your knowledge through engaging sessions designed to inspire and enlighten.

To have your events added or removed from this calendar, please contact OUR at ugresearch@illinois.edu

Mathematical and Theoretical Physics Seminar: Toward Stringy Horizons

Event Type: Seminar/Symposium
Sponsor: Physics Department
Location: Loomis Room 464
Date: Sep 5, 2024 1:00 pm
Speaker: Elliott Gesteau, California Institute of Technology
Contact: Ljubica Milutinovic
E-Mail: ljubicam@illinois.edu
Phone: 217-300-6393
Views: 32
Originating Calendar: Physics - Mathematical and Theoretical Physics Seminar; How can one define a causal structure or an event horizon in a stringy geometry? In this talk, I will show that this can be done by using the operator algebras of the holographic dual. In particular, I will introduce a new quantity, dubbed "depth parameter", which can be computed in terms of the algebraic structure of the large N boundary theory, and measures a notion of radial extension for the bulk dual of a boundary subregion that still makes sense away from strong coupling. The emergence of a stringy bifurcate horizon requires the depth parameter to be infinite, and the precise value of this depth parameter also allows to diagnose potential violations of the equivalence principle in the bulk at nonzero string length. The depth parameter can be computed in various examples of interest, in particular, it can be used to argue that a sharp horizon structure emerges at high temperature in the bulk dual of N=4 Super-Yang—Mills for all nonzero values of the ’t Hooft coupling.

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