Thermodynamics of Exotic Black Holes, Negative Temperature, and Bekenstein-Hawking Entropy

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dc.creatorPark, Mu-In
dc.date2006-02-11
dc.date2007-02-20
dc.date.accessioned2026-07-07T10:30:21Z
dc.date.available2026-07-07T10:30:21Z
dc.descriptionRecently, exotic black holes whose masses and angular momenta are interchanged have been found, and it is known that their entropies depend only on the $inner$ horizon areas. But a basic problem of these entropies is that the second law of thermodynamics is not guaranteed, in contrast to the Bekenstein-Hawking entropy. Here, I find that there is another entropy formula which recovers the usual Bekenstein-Hawking form, but the characteristic angular velocity and temperature are identified with those of the inner horizon, in order to satisfy the first law of black hole thermodynamics. The temperature has a $negative$ value, due to an upper bound of mass as in spin systems, and the angular velocity has a $lower$ bound. I show that one can obtain the same entropy formula from a conformal field theory computation, based on classical Virasoro algebras. I also describe several unanswered problems and some proposals for how these might be addressed.
dc.descriptionExplicit discussuin of the remanining open questions added, enlarged references accordingly, accepted in Phys. Lett. B
dc.identifierhttps://arxiv.org/abs/hep-th/0602114
dc.identifierhttp://arxiv.org/abs/hep-th/0602114
dc.identifierPhys.Lett.B647:472-476,2007
dc.identifierdoi:10.1016/j.physletb.2007.02.036
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/178108
dc.subjectHigh Energy Physics - Theory
dc.subjectAstrophysics
dc.subjectStatistical Mechanics
dc.subjectGeneral Relativity and Quantum Cosmology
dc.titleThermodynamics of Exotic Black Holes, Negative Temperature, and Bekenstein-Hawking Entropy
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