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SUMMARY:Dynamical Black Hole Entropy in Effective Field Theory - Iain Davi
 es\, University of Cambridge
DTSTART:20230127T130000Z
DTEND:20230127T140000Z
UID:TALK196234@talks.cam.ac.uk
CONTACT:Isobel Romero-Shaw
DESCRIPTION:In standard 2-derivative GR coupled to matter obeying the Null
  Energy condition\, the Bekenstein-Hawking definition of the entropy of a 
 black hole can be proved to satisfy a Second Law of Black Hole Mechanics. 
 However\, if we consider higher derivative theories of gravity this no lon
 ger necessarily holds. \nIn recent work\, Hollands\, Kovács and Reall hav
 e built on previous work of Wall to provide a definition of dynamical blac
 k hole entropy for gravitational effective field theories (EFTs). This ent
 ropy satisfies a Second Law to quadratic order in perturbations around a s
 tationary black hole. In this talk I will present the construction of the 
 entropy\, some explicit calculations for particular theories including Ein
 stein-Gauss-Bonnet that I have performed\, and the problem of gauge invari
 ance for this definition. The talk is based off the recent paper arxiv.org
 /abs/2212.09777.
LOCATION:Potter room/Zoom
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