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We count the number of regular supersymmetric solutions in supergravity, called superstrata, that represent non-linear completion of linear fluctuations around empty AdS(3)xS(3). These solutions carry the same charges as the D1-D5-P black hole and represent its microstates. We estimate the entropy using thermodynamic approximation and find that it is parametrically smaller than the area-entropy of the D1-D5-P black hole. Therefore, these superstrata based on AdS(3)x S-3 are not typical microstates of the black hole. What are missing in the superstrata based on AdS(3)x S-3 are higher and fractional modes in the dual CFT language. We speculate on what kind of other configurations to look at as possible realization of those modes in gravity picture, such as superstrata based on other geometries, as well as other brane configurations.
Keyword:
AdS-CFT Correspondence
Black Holes in String Theory
Supergravity Models
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5.5
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13.7W
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