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

Borun D. Chowdhury (1) , Bert Vercnocke (2)

1 Institute for Theoretical Physics
2 IPHT - Institut de Physique Théorique - UMR CNRS 3681

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.

Domaines: Physique des Hautes Energies - Théorie [hep-th]

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