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Monday, October 25, 2021 at 4:00pm to 5:00pm
Rockefeller Hall, Schwartz Auditorium
General Physics Colloquium, Professor Andrew Strominger, the Gwill E. York Professor of Physics, Harvard University
Title: Memory, Soft Theorems and the Symmetries of Nature
Host: Tom Hartman
Abstract: Beginning in the 1960s a variety of exact “soft theorems” were discovered in QED and general relativity which universally govern the scattering of photons and gravitons at very low energies. Around the same period, general relativists discovered a mysterious infinite number of “asymptotic symmetries” generalizing boosts, rotations and translations. A decade later it was found that the passage of gravitational radiation produces a “memory effect" in which inertial objects undergo a relative displacement. In the last five years, it has been shown that these three seemingly unrelated phenomena are in fact mathematically equivalent, and moreover have ubiquitous extensions. I will discuss these developments and their implications for the infrared problem, the black hole information paradox and upcoming experiments.
This talk will also be available via Zoom and the link will be emailed to the Physics listserv the day of the talk. If you are not on the listserv, please contact Sue Sullivan at firstname.lastname@example.org by Monday at 3:00 pm to request the link.