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New instability of non-extremal black holes: spitting out supertubes

Abstract : We search for stable bound states of non-extremal rotating three-charge black holes in five dimensions (Cvetic-Youm black holes) and supertubes. We do this by studying the potential of supertube probes in the non-extremal black hole background and find that generically the marginally bound state of the supersymmetric limit becomes metastable and disappears with non-extremality (higher temperature). However near extremality there is a range of parameters allowing for stable bound states, which have lower energy than the supertube-black hole merger. Angular momentum is crucial for this effect. We use this setup in the D1-D5 decoupling limit to map a thermodynamic instability of the CFT (a new phase which is entropically dominant over the black hole phase) to a tunneling instability of the black hole towards the supertube-black hole bound state. This generalizes the results of ArXiv:1108.0411 [hep-th], which mapped an entropy enigma in the bulk to the dual CFT in a supersymmetric setup.
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Contributor : Bruno Savelli <>
Submitted on : Friday, May 24, 2013 - 3:53:47 PM
Last modification on : Wednesday, April 14, 2021 - 12:12:06 PM

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Borun D. Chowdhury, Bert Vercnocke. New instability of non-extremal black holes: spitting out supertubes. Journal of High Energy Physics, Springer, 2012, pp.116. ⟨10.1007/JHEP02(2012)116⟩. ⟨cea-00825802⟩



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