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SUMMARY:Shall Bekenstein's Area Law Prevail? - David Kubiznak (Charles Uni
 versity in Prague)
DTSTART:20240510T120000Z
DTEND:20240510T130000Z
UID:TALK216721@talks.cam.ac.uk
CONTACT:Daniela Cors
DESCRIPTION:According to Bekenstein's area law\, the black hole entropy is
  identified holographically -- with one quarter of the horizon area. Howev
 er\, it is commonly believed that such a law is only valid in Einstein's t
 heory and that higher curvature corrections generically give rise to its m
 odifications. This is for example the case of black holes in Lovelock grav
 ities\, or their four-dimensional cousins in the recently discovered 4D sc
 alar-tensor Gauss-Bonnet gravity where one naively "finds" (classical) log
 arithmic corrections to Bekenstein's law. We will argue that such logarith
 mic corrections originate from ignoring the shift symmetry of the 4D Gauss
 -Bonnet gravity. When this symmetry is properly taken into account\, there
  is no longer any departure from the area law in this theory. Moreover\, t
 he first law remains valid upon modifying the black hole temperature\, whi
 ch can be derived via the Brown-York procedure but is no longer given by t
 he surface gravity. Interestingly\, we show that upon similar modification
  of the black hole temperature the area law can also\nprevail for black ho
 les in higher-dimensional Lovelock gravities. 
LOCATION:Potter room/Zoom
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