2000 character limit reached
Soft Gravity by Squaring Soft QED on the Celestial Sphere (2011.11412v3)
Published 23 Nov 2020 in hep-th, cond-mat.soft, and cond-mat.str-el
Abstract: We recast the soft $S$-matrices on the celestial sphere as correlation functions of certain $2$-dimensional models of topological defects. In pointing out the double copy structure between the soft photon and soft graviton cases, we arrive at a putative classical double copy between the corresponding topological models and a rederivation of gauge invariance and the equivalence principle as Ward identities of the $2$-dimensional theories.