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Boundary states and black hole entropy
1998
Physical Review D, Particles and fields
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Black hole entropy is derived from a sum over boundary states. The boundary states are labeled by energy and momentum surface densities, and parametrized by the boundary metric. The sum over state labels is expressed as a functional integral with measure determined by the density of states. The sum over metrics is expressed as a functional integral with measure determined by the universal expression for the inverse temperature gradient at the horizon. The analysis applies to any stationary,
doi:10.1103/physrevd.57.2624
fatcat:qm67suyemnflfc22gxvjx7d3ky