Strengthening the Weak Gravity Conjecture

Speaker: Ben Heidenreich, Harvard

When: February 24, 2016 (Wed), 03:30PM to 04:30PM (add to my calendar)
Location: PRB 595

This event is part of the HET Seminar Series.

The Weak Gravity Conjecture (WGC) posits that subextremal charged black holes can decay to charged particles, implying a mild constraint on the spectrum of a quantum gravity theory that has interesting phenomenological consequences. I examine the consistency of the WGC under toroidal compactification, showing that the WGC can be violated in the dimensionally reduced theory even when it holds in the higher dimensional theory. I propose a strengthening of the conjecture inspired by Kaluza-Klein theory which is consistent under compactification, and show that this strong form is satisfied in many explicit string theory examples. I comment on possible connections to the spectrum of charged operators in a CFT, both in two dimensions and in higher dimensions.