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Department of Physics Colloquium - Bethe Lecture Series

Monday, October 25, 2021 at 4:00pm to 5:00pm

Rockefeller Hall, Schwartz Auditorium
Central Campus

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.

Dial-In Information

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 sfc1@cornell.edu by Monday at 3:00 pm to request the link.

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Event Type

Colloquium

Departments

LASSP, Physics, LEPP, CLASSE

University Themes

Research

Tags

cascal, Phys

Hashtag

#physics

Contact E-Mail

sfc1@cornell.edu

Contact Name

Sue Sullivan

Contact Phone

607/255-7562

Speaker

Andrew Strominger

Speaker Affiliation

Harvard University

Dept. Web Site

https://physics.cornell.edu

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