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SUMMARY:A Critique of the Fuzzball Program (Suvrat Raju\, ICTS)
DTSTART;VALUE=DATE-TIME:20180403T044500Z
DTEND;VALUE=DATE-TIME:20180403T054500Z
DTSTAMP;VALUE=DATE-TIME:20210514T030758Z
UID:indico-contribution-2230@indico.ipmu.jp
DESCRIPTION:We explore the viability of fuzzballs as candidate microstate
geometries for the black hole\, and their possible role in resolutions of
the information paradox. We argue that if fuzzballs provide a description
of black-hole microstates\, then the typical fuzzball microstate can only
differ significantly from the conventional black-hole geometry at a Planc
k-scale-distance from the horizon. However\, precisely in this region quan
tum fluctuations in the fuzzball geometry become large and the fuzzball ge
ometry becomes unreliable. We verify these expectations through a detailed
calculation of quantum expectation values and quantum fluctuations in the
two-charge fuzzball geometries. We then examine a subset of the solution
s discovered in arXiv:1607.03908. We show\, based on a calculation of a p
robe two-point function in this background\, that these solutions\, and ot
hers in their class\, violate robust expectations about the gap in energie
s between successive energy eigenstates and also violate the eigenstate th
ermalization hypothesis. We conclude that while fuzzballs are interesting
star-like solutions in string theory\, they do not appear to be relevant
for resolving the information paradox\, and cannot be used to make valid i
nferences about black-hole interiors.\n\nhttps://indico.ipmu.jp/indico/eve
nt/145/contributions/2230/
LOCATION:Lecture Hall(1F)\, Kavli IPMU
URL:https://indico.ipmu.jp/indico/event/145/contributions/2230/
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