Causality, unitarity, and the weak gravity conjecture
Causality, unitarity, and the weak gravity conjecture
A bstract We consider the shift of charge-to-mass ratio for extremal black holes in the context of effective field theory, motivated by the Weak Gravity Conjecture. We constrain extremality corrections in different regimes subject to unitarity and causality constraints. In the asymptotic IR, we demonstrate that for any supersymmetric theory …