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• W2146074827 abstract "In this article we will analyze the possibility of a nontrivial central extension of the Poisson algebra of the diffeomorphism generators, which respect certain boundary conditions on the black hole bifurcation. The origin of a possible central extension in the algebra is due to the existence of boundary terms in the in the canonical generators. The existence of such boundary terms depend on the exact boundary conditions one takes. We will check two possible boundary conditions i.e. fixed bolt metric and fixed surface gravity. In the case of fixed metric the the action acquires a boundary term associated to the bifurcation but this is canceled in the Legendre transformation and so absent in the canonical generator and so in this case the possibility of a nontrivial central extension is ruled out. In the case of fixed surface gravity the boundary term in the action is absent but present in the Hamiltonian. Also in this case we will see that there is no nontrivial central extension, also if there exist a boundary term in the generator." @default.
• W2146074827 created "2016-06-24" @default.
• W2146074827 creator A5075761000 @default.
• W2146074827 date "2004-08-09" @default.
• W2146074827 modified "2023-09-26" @default.
• W2146074827 title "Poisson algebra of diffeomorphism generators in a spacetime containing a bifurcation" @default.
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• W2146074827 doi "https://doi.org/10.1103/physrevd.70.044005" @default.
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