Gravity as a gapless phase & biform symmetries.

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• Diego Hofman
• Thursday 24 November 2022, 13:00-14:00
• Potter Room, DAMTP.

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What defines a theory of gravity? Diffeomorphism invariance? Gauge symmetries are unphysical so we would like to have another definition. A massless spin 2 particle? Better. Typically EFTs are defined by their symmetries and can exhibit different phases. But a UV complete theory of quantum gravity is supposed to have no global symmetries. We will approach this problem from the IR and describe the structure organizing the EFT we call gravity. We will show how this structure, through anomalies, protects the masslessness of the graviton. We will comment on future directions and how to make contact with the UV perspective.

This talk is part of the Quantum Fields and Strings Seminars series.

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