منابع مشابه
2 00 5 Ten Theses on Black Hole Entropy ⋆
I present a viewpoint on black hole thermodynamics according to which the entropy: derives from horizon “degrees of freedom”; is finite because the deep structure of spacetime is discrete; is “objective” thanks to the distinguished coarse graining provided by the horizon; and obeys the second law of thermodynamics precisely because the effective dynamics of the exterior region is not unitary. P...
متن کاملOn black hole entropy.
Two techniques for computing black hole entropy in generally covariant gravity theories including arbitrary higher derivative interactions are studied. The techniques are Wald’s Noether charge approach introduced recently, and a field redefinition method developed in this paper. Wald’s results are extended by establishing that his local geometric expression for the black hole entropy gives the ...
متن کاملDynamic black-hole entropy
We consider two non-statistical definitions of entropy for dynamic (non-stationary) black holes in spherical symmetry. The first is analogous to the original Clausius definition of thermodynamic entropy: there is a first law containing an energy-supply term which equals surface gravity times a total differential. The second is Wald’s Noether-charge method, adapted to dynamic black holes by usin...
متن کاملBlack hole entropy quantization.
Ever since the pioneering works of Bekenstein and Hawking, black hole entropy has been known to have a quantum origin. Furthermore, it has long been argued by Bekenstein that entropy should be quantized in discrete (equidistant) steps given its identification with horizon area in (semi-)classical general relativity and the properties of area as an adiabatic invariant. This lead to the suggestio...
متن کاملAutomorphic Black Hole Entropy
Over the past few years the understanding of the microscopic theory of black hole entropy has made important conceptual progress by recognizing that the degeneracies are encoded in partition functions which are determined by higher rank automorphic representations, in particular in the context of Siegel modular forms of genus two. In this brief review some of the elements of this framework are ...
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ژورنال
عنوان ژورنال: Studies in History and Philosophy of Science Part B: Studies in History and Philosophy of Modern Physics
سال: 2005
ISSN: 1355-2198
DOI: 10.1016/j.shpsb.2005.02.002