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SUMMARY:A Critique of the Fuzzball Program
DTSTART;VALUE=DATE-TIME:20180411T060000Z
DTEND;VALUE=DATE-TIME:20180411T070000Z
DTSTAMP;VALUE=DATE-TIME:20180618T001957Z
UID:indico-event-6364@cern.ch
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 some of the solutions dis
covered in arXiv:1607.03908. We show\, based on a calculation of a probe t
wo-point function in this background\, that these solutions\, and others i
n their class\, violate robust expectations about the gap in energies betw
een successive energy eigenstates\, and differ too much from the convent
ional black-hole to represent viable microstates. We conclude that while
fuzzballs are interesting star-like solutions in string theory\, they do n
ot appear to be relevant for resolving the information paradox\, and canno
t be used to make valid inferences about black-hole interiors.\n\nhttps://
indico.tifr.res.in/indico/conferenceDisplay.py?confId=6364
LOCATION: A 304
URL:https://indico.tifr.res.in/indico/conferenceDisplay.py?confId=6364
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