Fuzzball Solutions for Black Holes and D1BraneD5Brane Microstates
Abstract
We revisit the relation between fuzzball solutions and D1braneD5brane microstates. A consequence of the fact that the R ground states (in the usual basis) are eigenstates of the R charge is that only neutral operators can have nonvanishing expectation values on these states. We compute the holographic 1point functions of the fuzzball solutions and find that charged chiral primaries have nonzero expectation values, except when the curve characterizing the solution is circular. The nonzero vacuum expectation values reflect the fact that a generic curve breaks R symmetry completely. This implies that fuzzball solutions (excepting circular ones) can only correspond to superpositions of R states and we give a proposal for the superposition corresponding to a given curve. We also address the question of what would be the geometric dual of a given R ground state.
 Authors:
 Institute for Theoretical Physics, University of Amsterdam, Valckenierstraat 65, 1018 XE Amsterdam (Netherlands)
 Publication Date:
 OSTI Identifier:
 20955463
 Resource Type:
 Journal Article
 Resource Relation:
 Journal Name: Physical Review Letters; Journal Volume: 98; Journal Issue: 7; Other Information: DOI: 10.1103/PhysRevLett.98.071601; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
 Country of Publication:
 United States
 Language:
 English
 Subject:
 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; BLACK HOLES; BRANES; CHIRALITY; COSMOLOGICAL MODELS; EIGENSTATES; FUZZY LOGIC; GROUND STATES; HOLOGRAPHY; MATHEMATICAL SOLUTIONS; STRING THEORY; SYMMETRY
Citation Formats
Skenderis, Kostas, and Taylor, Marika. Fuzzball Solutions for Black Holes and D1BraneD5Brane Microstates. United States: N. p., 2007.
Web. doi:10.1103/PHYSREVLETT.98.071601.
Skenderis, Kostas, & Taylor, Marika. Fuzzball Solutions for Black Holes and D1BraneD5Brane Microstates. United States. doi:10.1103/PHYSREVLETT.98.071601.
Skenderis, Kostas, and Taylor, Marika. Fri .
"Fuzzball Solutions for Black Holes and D1BraneD5Brane Microstates". United States.
doi:10.1103/PHYSREVLETT.98.071601.
@article{osti_20955463,
title = {Fuzzball Solutions for Black Holes and D1BraneD5Brane Microstates},
author = {Skenderis, Kostas and Taylor, Marika},
abstractNote = {We revisit the relation between fuzzball solutions and D1braneD5brane microstates. A consequence of the fact that the R ground states (in the usual basis) are eigenstates of the R charge is that only neutral operators can have nonvanishing expectation values on these states. We compute the holographic 1point functions of the fuzzball solutions and find that charged chiral primaries have nonzero expectation values, except when the curve characterizing the solution is circular. The nonzero vacuum expectation values reflect the fact that a generic curve breaks R symmetry completely. This implies that fuzzball solutions (excepting circular ones) can only correspond to superpositions of R states and we give a proposal for the superposition corresponding to a given curve. We also address the question of what would be the geometric dual of a given R ground state.},
doi = {10.1103/PHYSREVLETT.98.071601},
journal = {Physical Review Letters},
number = 7,
volume = 98,
place = {United States},
year = {Fri Feb 16 00:00:00 EST 2007},
month = {Fri Feb 16 00:00:00 EST 2007}
}

We examine the stability of the nonextremal D1D5P black hole solutions. In particular, we look for the appearance of a superradiant instability for the spinning black holes but we find no evidence of such an instability. We compare this situation with that for the smooth soliton geometries, which were recently observed to suffer from an ergoregion instability, and consider the implications for the fuzzball proposal.

Hawking radiation from GarfinkleHorowitzStrominger and nonextremal D1D5 black holes via covariant anomalies
We apply the method of Banerjee and Kulkarni [R. Banerjee and S. Kulkarni, Phys. Rev. D 77, 024018 (2008).] to provide a derivation of Hawking radiation from the GarfinkleHorowitzStrominger (stringy) black hole which falls in the class of the most general spherically symmetric black holes ({radical}(g){ne}1) and also the nonextremal D1D5 black hole using only covariant gravitational anomalies. 
Microstates of the D1D5KaluzaKlein monopole system
We find supergravity solutions corresponding to all U(1)xU(1) invariant chiral primaries of the D1D5KK system. These solutions are 1/8 BPS, carry angular momentum, and are asymptotically flat in the 3+1 dimensional sense. They can be thought of as representing the ground states of the fourdimensional black hole constructed from the D1D5KKP system. Demanding the absence of unphysical singularities in our solutions determines all free parameters, and gives precise agreement with the quantum numbers expected from the CFT point of view. The physical mechanism behind the smoothness of the solutions is that the D1 branes and D5 branes expand into amore »