1995/08/28 by Erik A. Martinez, Martinez, Erik A.
Physics and Astronomy · #FOS: Physical sciences #General Relativity and Quantum Cosmology (gr-qc) #gr-qc
paper · pdf · doi:10.48550/arxiv.gr-qc/9508057
To appear in the proceedings of the Sixth Canadian Conference on General Relativiy and Relativistic Astrophysics, 7 pages, Latex
arxiv created 1995/08/28 · arxiv updated 2009/11/30
The entropy of a quantum-statistical system which is classically approximated by a general stationary eternal black hole is studied by means of a microcanonical functional integral. This approach opens the possibility of including explicitly the internal degrees of freedom of a physical black hole in path integral descriptions of its thermodynamical properties. If the functional integral is interpreted as the density of states of the system, the corresponding entropy equals cal S = AH/4 - AH/4 =0 in the semiclassical approximation, where AH is the area of the black hole horizon. The functional integral reflects the properties of a pure state.