Infinite towers of supertranslation and superrotation memories

Abstract

A framework that structures the gravitational memory effects and which is consistent with gravitational electric-magnetic duality is presented. A correspondence is described between memory observables, particular subleading residual gauge transformations, associated overleading gauge transformations and their canonical surface charges. It is shown that matter-induced transitions can generate infinite towers of independent memory effects at null infinity. These memories are associated with an infinite number of conservation laws at spatial infinity which lead to degenerate towers of subleading soft graviton theorems. It is shown that the leading order mutually commuting supertranslations and (novel) superrotations are both associated with a leading displacement memory effect, which suggests the existence of new boundary conditions.

5 pages. Proof of existence of towers of memories added. To be published in PRL

References in corpus (4)

• Asymptotic symmetries and subleading soft graviton theorem
• Conformal Carroll groups and BMS symmetry
• Conformal Carroll groups
• Sub-subleading soft gravitons and large diffeomorphisms

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