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• W4240897355 abstract "We consider the nonrotating isolated horizon as an inner boundary of a four-dimensional asymptotically flat spacetime region. Due to the symmetry of the isolated horizon, it turns out that the boundary degrees of freedom can be described by a SO(1,1) BF theory with sources. This provides a new alternative approach to the usual one using Chern-Simons theory to study the black hole entropy. To count the microscopical degrees of freedom with the boundary BF theory, the entropy of the isolated horizon can also be calculated in the framework of loop quantum gravity. The leading-order contribution to the entropy coincides with the Bekenstein-Hawking area law only for a particular choice of the Barbero-Immirzi parameter, which is different from its value in the usual approach using Chern-Simons theory. Moreover, the quantum correction to the entropy formula is a constant term rather than a logarithmic term." @default.
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• W4240897355 date "2014-04-22" @default.
• W4240897355 modified "2023-10-16" @default.
• W4240897355 title "BF theory explanation of the entropy for nonrotating isolated horizons" @default.
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• W4240897355 doi "https://doi.org/10.1103/physrevd.89.084065" @default.
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