University of Minnesota
School of Physics & Astronomy

Physics and Astronomy Calendar

Friday, April 19th 2019
12:30 pm:
Speaker: Matt Reece (Harvard U.)
Subject: The Weak Gravity Conjecture and Photon Masses

I will review the Weak Gravity Conjecture (WGC) and related ideas (such as the Swampland Distance Conjecture and “tower” versions of the WGC), which aim at characterizing generic properties of quantum gravity theories that can be used to diagnose when a low-energy effective field theory cannot be completed into a consistent gravitational theory. As one application, I will explain how arguments based on these conjectures suggest that a theory of quantum gravity requires the photon to be exactly massless.

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