共查询到20条相似文献,搜索用时 140 毫秒
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利用brick-wall模型研究了引力场对Vaidya-Bonner-de Sitter黑洞熵的量子修正.当黑洞事 件视界不随超前时间变化时,结果与Reissner-Nordstrm-de Sitter黑洞的量子熵完全相 同. 相似文献
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在同时考虑吸积和Blandford-Znajek过程的条件下,详细讨论了吸积盘(包括薄盘和厚盘)中心黑洞的自转角速度Ωh的演化特征.结果表明,当黑洞的无量纲角动量a*演化到某一临界时,Ωh对时间的变化率由正变负,从而推断在顺行吸积过程事Ωh先增后减,演化非单调,因而存在一个极大值.并指出黑洞的无量纲角动理a*比黑洞的角动量J和自转角速度Ωh更适合描写吸积盘中心黑洞自转状态的演
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利用广义不确定关系修正的态密度方程并采用Wentzel-Kramers-Brillouin (WKB) 近似方法, 计算了Reissner-Nordström-de Sitter (RNdS) 黑洞时空中标量场的统计力学熵. 结果表明, 由这种方法得到的黑洞熵与它的内、外视界面积和宇宙视界面积之和成正比, 这与采用其他方法所得的结果一致, 从而揭示了黑洞熵与视界面积之间的内在联系, 也进一步表明了黑洞熵是视界面上量子态的熵, 是一种量子效应. 相似文献
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利用广义不确定关系修正的态密度方程并采用Wentzel-Kramers-Brillouin(WKB)近似方法,计算了Reissner-Nordstrm-de Sitter(RNdS)黑洞时空中标量场的统计力学熵.结果表明,由这种方法得到的黑洞熵与它的内、外视界面积和宇宙视界面积之和成正比,这与采用其他方法所得的结果一致,从而揭示了黑洞熵与视界面积之间的内在联系,也进一步表明了黑洞熵是视界面上量子态的熵,是一种量子效应. 相似文献
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Wen-Di Guo Shao-Wen Wei Yan-Yan Li Yu-Xiao Liu 《The European Physical Journal C - Particles and Fields》2017,77(12):904
The “complexity = action” duality states that the quantum complexity is equal to the action of the stationary AdS black hole within the Wheeler–DeWitt patch at late time approximation. We compute the action growth rates of the neutral and charged black holes in massive gravity and the neutral, charged and Kerr–Newman black holes in f(R) gravity to test this conjecture. Besides, we investigate the effects of the massive graviton terms, higher derivative terms and the topology of the black hole horizon on the complexity growth rate. 相似文献
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YE Chi-Zhou 《理论物理通讯》2008,50(6):1336-1340
From the perturbation around the background spacetimes in the
Gauss-Bonnet gravity, we find the physical evidence that Ricci
flat AdS black holes and AdS solitons are different physical
configurations and stay in different phases, this serves as a
strong support to the previous mathematical and thermodynamical
arguments. 相似文献
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S. Alexeyev N. Popov M. Startseva A. Barrau J. Grain 《Journal of Experimental and Theoretical Physics》2008,106(4):709-713
Gauss-Bonnet gravity provides one of the most promising frameworks for studying curvature corrections to the Einstein action
in supersymmetric string theories while avoiding ghosts and keeping second-order field equations. Although Schwarzschild-type
solutions for Gauss-Bonnet black holes have been known for a long time, the Kerr-Gauss-Bonnet metric was missing. A five dimensional
Gauss-Bonnet solution is obtained analytically for spinning black holes, and the related thermodynamical properties are briefly
outlined.
The text was submitted by the authors in English. 相似文献
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Motivated by recent work, nonmonotonic behaviors of photon sphere radius can be used to reflect black hole phase transition for Reissner-Nordström-AdS (RN-AdS) black holes, we study the case of five-dimensional charged Gauss-Bonnet-AdS black holes in the reduced parameter space. We find that the nonmonotonic behaviors of photon sphere radius still exist. Using the coexistence line calculated from P-V plane, we capture the photon sphere radius of saturated small and large black holes (the boundary of the coexistence phase), then illustrate the reduced coexistence region. The results show that, reduced coexistence region decreases with charge Q but increases with Gauss-Bonnet coefficient α. When the charge vanishes, reduced coexistence region does not vary with Gauss-Bonnet coefficient α any more. In this case, the Gauss-Bonnet coefficient α plays the same role as the charge of five-dimensional RN-AdS black holes. Also, the situation of higher dimension is studied in the end. 相似文献
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We investigate the massive vector particles' Hawking radiation from the neutral rotating Anti-de Sitter(AdS) black holes in conformal gravity by using the tunneling method.It is well known that the dynamics of massive vector particles are governed by the Proca field equation.Applying WKB approximation to the Proca equation,the tunneling probabilities and radiation spectrums of the emitted particles are derived.Hawking temperature of the neutral rotating AdS black holes in conformal gravity is recovered,which is consistent with the previous result in the literature. 相似文献
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In this paper, we use the modified Hod's treatment and the Kunstatter's method to study the horizon area spectrum and entropy spectrum in Gauss-Bonnet de-Sitter space-time, which is regarded as the natural generalization of Einstein gravity by including higher derivative correction terms to the original Einstein-Hilbert action. The horizon areas have some properties that are very different from the vacuum solutions obtained from the frame of Einstein gravity. With the new physical interpretation of quasinormal modes, the area/entropy spectrum for the event horizon for nearextremal Gauss-Bonnet de Sitter black holes are obtained. Meanwhile, we also extend the discussion of area/entropy quantization to the non-extremal black holes solutions. 相似文献
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We compute the mass and temperature of third order Lovelock black holes with negative Gauss-Bonnet coefficient α2<0 in anti-de Sitter space and perform the stability analysis of topological black holes. When k=-1, the third order Lovelock black holes are thermodynamically stable for the whole range r+. When k=1, we found that the black hole has an intermediate unstable phase for D=7. In eight dimensional spacetimes, however, a new phase of thermodynamically unstable small black holes appears if the coefficient \tilde{\alpha} is under a critical value.For D≧ 9, black holes have similar the distributions of thermodynamically stable regions to the case where the coefficient \tilde{\alpha} is under a critical value for D=8. It is worth to mention that all the thermodynamic and conserved quantities of the black holes with flat horizon do not depend on the Lovelock coefficients and are the same as those of black holes in general gravity. 相似文献
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Jun-Jin Peng Shuang-Qing Wu 《The European Physical Journal C - Particles and Fields》2010,66(1-2):325-331
We study the Hawking radiation of spherically symmetric, asymptotically flat black holes in the infrared modified Ho?ava–Lifshitz gravity by applying the methods of covariant anomaly cancelation and effective action, as well as the approach of Damour–Ruffini–Sannan’s. These black holes behave as the usual Schwarzschild ones of general relativity when the radial distance is very large. We also extend the method of covariant anomaly cancelation to derive the Hawking temperature of the spherically symmetric, asymptotically AdS black holes that represent the analogues of the Schwarzschild AdS ones. 相似文献
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We investigate extremal charged black hole solutions in the four-dimensional string frame Gauss-Bonnet gravity with the Maxwell
field and the dilaton. Without curvature corrections, the extremal electrically charged dilatonic black holes have singular
horizon and zero Bekenstein entropy. When the Gauss-Bonnet term is switched on, the horizon radius expands to a finite value
provided curvature corrections are strong enough. Below a certain threshold value of the Gauss-Bonnet coupling the extremal
black hole solutions cease to exist. Since decreasing Gauss-Bonnet coupling corresponds to decreasing string coupling g
s
, the situation can tentatively be interpreted as classical indication on the black hole—string transition. Previously the
extremal dilaton black holes were studied in the Einstein-frame version of the Gauss-Bonnet gravity. Here we work in the string
frame version of the theory with the S-duality symmetric dilaton function as required by the heterotic string theory.
The article is published in the original. 相似文献