منابع مشابه
On 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 ...
متن کاملBlack Hole Entropy
It has a horizon at r = 2M , which is a singularity of this coordinate system, but the curvature is not singular there, and regular Kruskal coordinates may be chosen. There is, however, a curvature singularity at r = 0, which is to be regarded as the location of a point source of mass M . Another example is the Reissner Nordström solution of the Einstein Maxwell equations. The metric is given by
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ژورنال
عنوان ژورنال: Pramana
سال: 2011
ISSN: 0304-4289,0973-7111
DOI: 10.1007/s12043-011-0065-8