منابع مشابه
Black hole entropy as T - duality invariant
We study the Euler numbers and the entropies of the non-extremal intersecting D-branes in ten-dimensions. We use the surface gravity to constrain the compactification radii. We correctly obtain the integer valued Euler numbers for these radii. Moreover, the entropies are found to be invariant under the T-duality transformation. In the extremal limit, we obtain the finite entropies only for two ...
متن کاملBlack hole entropy as T - duality invariant Kenji
We study the Euler numbers and the entropies of the non-extremal intersecting D-branes in ten-dimensions. We use the surface gravity to constrain the compactification radii. We correctly obtain the integer valued Euler numbers for these radii. Moreover, the entropies are found to be invariant under the T-duality transformation. In the extremal limit, we obtain the finite entropies only for two ...
متن کاملBlack Hole Electromagnetic Duality
After defining the concept of duality in the context of general n-form abelian gauge fields in 2n dimensions, we show by explicit example the difference between apparent but unrealizable duality transformations, namely those inD = 4k+2, and those, in D = 4k, that can be implemented by explicit dynamical generators. We then consider duality transformations in Maxwell theory in the presence of gr...
متن کاملBlack hole entropy as entanglement entropy: a holographic derivation
We study the possibility that black hole entropy be identified as entropy of entanglement across the horizon of the vacuum of a quantum field in the presence of the black hole. We argue that a recent proposal for computing entanglement entropy using AdS/CFT holography implies that black hole entropy can be exactly equated with entanglement entropy. The implementation of entanglement entropy in ...
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 ...
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ژورنال
عنوان ژورنال: Physical Review D
سال: 1998
ISSN: 0556-2821,1089-4918
DOI: 10.1103/physrevd.58.064025