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CATEGORIES:Theoretical Physics Colloquium
SUMMARY:Quantum black holes: a macroscopic window into qua
ntum gravity - Sameer Murthy\, King's College Lon
don
DTSTART;TZID=Europe/London:20180425T141500
DTEND;TZID=Europe/London:20180425T151500
UID:TALK103444AThttp://talks.cam.ac.uk
URL:http://talks.cam.ac.uk/talk/index/103444
DESCRIPTION:The pioneering work of Bekenstein and Hawking in t
he 70s showed that black holes have a thermodynami
c behavior. They produced a universal area law for
black hole entropy valid in the limit that the bl
ack hole is infinitely large. Quantum effects indu
ce finite-size corrections to this formula\, thus
providing a window into the fundamental microscopi
c theory of gravity and its deviations from classi
cal general relativity. In this talk I will discus
s recent advances in high-precision computations o
f quantum black hole entropy in supersymmetric the
ories of gravity\, using new localization techniqu
es. These calculations allow us to test the sugges
tion that black holes are really ensembles of micr
oscopic states in a very detailed manner\, much be
yond the semi-classical limit. \n\nI will then dis
cuss how one can independently verify these calcul
ations using explicit models of microscopic ensemb
les for black holes in string theory constructed i
n the 90s. These investigations throw up a surpris
ing link to number theory and the so-called Mock m
odular forms of Ramanujan. I will end by sketching
some research directions that these ideas lead to
.
LOCATION:MR2\, Centre for Mathematical Sciences
CONTACT:David Marsh
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