Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2009-04-07
Phys.Rev.D80:044020,2009
Physics
High Energy Physics
High Energy Physics - Theory
16 pages; v2: published version
Scientific paper
10.1103/PhysRevD.80.044020
We reconsider the possibility of violating the generalized second law of thermodynamics in theories with spontaneous Lorentz violation. It has been proposed that this may be accomplished in particular with a black hole immersed in a ghost condensate background, which may be taken to break Lorentz invariance without appreciably distorting the space-time geometry. In this paper we show that there in fact exist solutions explicitly describing flow of negative energy into these black holes, allowing for violation of the second law in a very simple way. This second law violation is independent of any additional assumptions such as couplings of the ghost condensate to secondary fields, and suggests that violation of the null energy condition may be the true source of pathology in these theories.
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