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Thursday, November 30, 2023
12:00 PM - 1:00 PM
Online and In-Person Event

High Energy Physics Seminar

Quantum Hair and Black Hole Information
Stephen Hsu, Michigan State University,

Special date and time

I discuss recent results concerning the quantum state of the gravitational field of a compact matter source such as a black hole. These results demonstrate the existence of quantum hair, violating the classical No Hair theorems. I then discuss how this quantum hair affects Hawking radiation, allowing unitary evaporation of black holes. Small corrections to leading order Hawking radiation
amplitudes, with weak dependence on the external graviton state, are sufficient to produce a pure final radiation state. The radiation state violates the factorization assumption made in standard formulations of the information paradox. These conclusions are consequences of long wavelength properties of quantum gravity: no special assumptions are made concerning short distance (Planckian) physics.

Talk is in 469 Lauritsen.
Contact [email protected] for Zoom link.