Recent work has uncovered interesting connections between memory effects, soft theorems and BMS asymptotic symmetries in the infrared structure of asymptotically flat gravity. In this talk, I will present the AdS/dS generalization of the BMS symmetries. I will discuss the realization of these “Lambda-BMS” symmetries as a surface charge algebra. I will also show that the asymptotically flat BMS surface charge algebra is recovered in the asymptotically flat limit only after adding corner terms in the variational principle in addition to the standard holographic counterterms.
Recordings of past talks can be found here: www.youtube.com/channel/UCw9LdPQ5t7Q7muD0qzn70TA