Speaker
Description
In this talk I will show that edge modes in free Maxwell theory in 3+1 dimensions lead to correlated fluctuations in the large gauge charges of a subregion and its complement, and result in a non-trivial contribution to the entanglement entropy across a cut of future null infinity. I will then outline a generalization of these ideas to gravity. In particular, I will highlight a novel relation between the on-shell action in 3+1 dimensional asymptotically flat spacetime, the 2d soft effective action and the shockwave effective action leading to an estimate of spacetime fluctuations in a causal diamond. The talk is based on 2308.12341 with Vincent Chen and Rob Myers, as well as 2305.14411 and work in progress with Temple He and Kathryn Zurek.
