共查询到20条相似文献,搜索用时 15 毫秒
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We find a new rotating black hole in three-dimensional anti-de Sitter space using an anisotropic perfect fluid inspired by
the noncommutative black hole. We deduce the thermodynamical quantities of this black hole and compare them with those of
a rotating BTZ solution and give corrections to the area law to get the exact nature of the Bekenstein-Hawking entropy. 相似文献
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The vacuum Einstein equations in five dimensions are shown to admit a solution describing a stationary asymptotically flat spacetime regular on and outside an event horizon of topology S1xS2. It describes a rotating "black ring." This is the first example of a stationary asymptotically flat vacuum solution with an event horizon of nonspherical topology. The existence of this solution implies that the uniqueness theorems valid in four dimensions do not have simple five-dimensional generalizations. It is suggested that increasing the spin of a spherical black hole beyond a critical value results in a transition to a black ring, which can have an arbitrarily large angular momentum for a given mass. 相似文献
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Shesansu Sekhar Pal 《Pramana》2004,62(3):699-702
We calculate the correction to the Bekenstein-Hawking entropy formula for five-dimensional AdS-Schwarzschild black holes due
to thermodynamic fluctuations. The result is then compared with the boundary gauge theory entropy corrections via AdS/CFT
correspondence. 相似文献
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用砖墙模型的方法,讨论了无源引力场对Barriola-Vilenkin黑洞熵的量子修正.计算表明, 量子修正应该包含两部分:其中一部分与视界面积成正比,在视界附近与紫外截断因子是 平方反比发散的;另一部分是两个对数发散项,这部分除了与黑洞的本身特征性质(M,η) 有关以外,还与自旋场的自旋有关.结果与标量场引起的量子修正具有完全不同的形式.
关键词:
砖墙模型
量子修正
黑洞熵 相似文献
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Using the new equation of state density from the generalized uncertainty principle, we investigate statistics entropy of a 3-dimensional rotating acoustic black hole. When λ introduced in the generalized uncertainty principle takes a specific value, we obtain an area entropy and a correction term associated with the acoustic black hole. In this method, there does not exist any divergence and one needs not the small mass approximation in the original brick-wall model. 相似文献
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Ashoke Sen 《General Relativity and Gravitation》2012,44(5):1207-1266
Logarithmic corrections to the extremal black hole entropy can be computed purely in terms of the low energy data—the spectrum
of massless fields and their interaction. The demand of reproducing these corrections provides a strong constraint on any
microscopic theory of quantum gravity that attempts to explain the black hole entropy. Using quantum entropy function formalism
we compute logarithmic corrections to the entropy of half BPS black holes in N=2{{\mathcal N}=2} supersymmetric string theories. Our results allow us to test various proposals for the measure in the OSV formula, and we
find agreement with the measure proposed by Denef and Moore if we assume their result to be valid at weak topological string
coupling. Our analysis also gives the logarithmic corrections to the entropy of extremal Reissner–Nordstrom black holes in
ordinary Einstein–Maxwell theory. 相似文献
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We introduce an effective action smoothly extending the standard Einstein–Hilbert action to include un-gravity effects. The improved field equations are solved for the un-graviton corrected Schwarzschild geometry reproducing the Mureika result. This is an important test to confirm the original “guess” of the form of the un-Schwarzschild metric. Instead of working in the weak field approximation and “dressing” the Newtonian potential with un-gravitons, we solve the “effective Einstein equations” including all order un-gravity effects. An unexpected “bonus” of accounting un-gravity effects is the fractalisation of the event horizon. In the un-gravity dominated regime the event horizon thermodynamically behaves as fractal surface of dimensionality twice the scale dimension dU. 相似文献
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Myers RC 《Physical review D: Particles and fields》1994,50(10):6412-6421
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We introduce a magnetically charged extremal regular black hole in the coupled system of Einstein gravity and nonlinear electrodynamics. Its near horizon geometry is given by AdS2×S2. It turns out that the entropy function approach does not automatically lead to a correct entropy of the Bekenstein–Hawking entropy. This contrasts to the case of the extremal Reissner–Norström black hole in the Einstein–Maxwell theory. We conclude that the entropy function approach does not work for a magnetically charged extremal regular black hole without singularity, because of the nonlinearity of the entropy function. 相似文献
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We study the Hawking radiation of the scalar field in the rotating Godel black hole in minimal five-dimensional supergravity. We not only derive radiation spectra that satisfy the unitary principle but also obtain the correction term of Bekenstein-Hawking entropy. The conclusion will help us learn more about the rotating Godel black hole in minimal five-dimensional supergravity. This provides a greater understanding of the thermal radiation of black holes. 相似文献