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SUMMARY:Gravity as a gapless phase &amp\; biform symmetries. - Diego Hofma
 n
DTSTART:20221124T130000Z
DTEND:20221124T140000Z
UID:TALK184283@talks.cam.ac.uk
CONTACT:85816
DESCRIPTION:What defines a theory of gravity? Diffeomorphism invariance? G
 auge 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 q
 uantum 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\, protec
 ts the masslessness of the graviton. We will comment on future directions 
 and how to make contact with the UV perspective.
LOCATION:Potter Room\, DAMTP
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