High Energy Theory Seminar

When fluctuation sent to charged and rotating black hole, and if the fluctuation satisfied specific condition, black hole reacts with larger energy mode. This phenomenon called superradiance makes some group of rotating charged black hole solution in AdS space unstable. This is because AdS space is a box and enhanced mode reflected back onto black hole and amplified again. Other than pure curiosity, understanding the endpoint of this superradiant instability of AdS black hole is important because the endpoint would be the dominant saddle of gravity dual picture of large N CFT.
The endpoint of the instability of charged AdS black hole was well studied before but for rotating black hole we didn't have a clear picture other than numerical solution called Black Resonator. Also, we were lack of bulk solution of large N CFT operator near unitarity bound because AdS Kerr black hole cannot cover the area near E~J. In this talk, I will suggest new class of solutions called "Gray Galaxy" as the endpoint of the superradiant instability and this solution gives new dual picture of large N CFT including the near unitarity bound.

The talk is in 469 Lauritsen Laboratory.

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