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Hawking radiation as tunnelling from arbitrarily dimensional Reissner-Nordstrom de Sitter black hole

Chinese Physics B 2006年第11期15卷 2523-2528页

作者：蒋青权杨树政吴双清 Institute of Theoretical Physics China West Normal University Nanchong 637002 China Department of Physics and College of Physical Science and Technology Central China Normal University Wuhan 430079 China

This paper extends Parikh-Wilzcek＇s recent work, which treats the Hawking radiation as a semi-classical tunnelling process from the event horizon of four dimensional Schwarzshild and Reissner-Nordstrom black holes, to that of arbitrarily dimensional Reissner-Nordstrom de Sitter black hole. The result shows that the tunnelling rate is related to the change of Bekenstein-Hawking entropy and the factually radiant spectrum is no longer precisely thermal after taking the dynamical black hole background and energy conservation into account, but is consistent with the underlying unitary theory and then satisfies the first law of the black hole thermodynamics. Meanwhile, in Parikh-Wilzcek＇s framework, this paper points out that the information conservation is only suitable for the reversible process but in highly unstable evaporating black hole （irreversible process） the information loss is possible.

关键词： black hole radiation tunnelling rate Bekenstein-Hawking entropy first law of the black hole thermodynamics

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Scalar resonant frequencies and Hawking effect of an f(R) global monopole

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Chinese Physics C 2017年第9期41卷 138-145页

作者： H. S. Vieira J. P. Morals Graca V. B. Bezerra Institute of Cosmology Department of Physics and Astronomy Tufts University Medford Massachusetts 02155 USA Departamento de Fisica Universidade Federal da Parafba Caixa Postal 5008 CEP 58051-970 Joao Pessoa PB Brazil Instituto de Fisica Universidade Federal do Parana Curitiba PR Brazil

Massive scalar fields are considered in with a global monopole in f（R） gravity. The exact background is obtained and is given in terms of the Heun functions to study the Hawking radiation and the gravitational field produced by a Schwarzschild black hole solution of the radial part of the Klein-Gordon equation in this general Heun functions. We apply the properties of the general the resonant frequencies of scalar particles.

关键词： massive scalar field general Heun function black hole radiation energy level

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Analytic solutions in the acoustic black hole analogue of the conical Kerr metric

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Chinese Physics C 2017年第4期41卷 33-37页

作者： H. S. Vieira Departamento de Ffsica Universidade Federal da Paraiba Caixa Postal 5008 CEP 58051-970 Joao Pessoa PB Brazil Centro de Ciencias Tecnologia e Saude Universidade Estadual da Parafba CEP 58233-000 Araruna PB Brazil

We study the sound perturbation of a rotating acoustic black hole in the presence of a disclination. The radial part of the massless Klein-Gordon equation is written into a Heun form, and its analytical solution is obtained. These solutions have an explicit dependence on the parameter of the disclination. We obtain the exact Hawking-Unruh radiation spectrum.

关键词： draining bathtub fluid flow disclination topological defect massless Klein-Gordon equation confluent Heun function black hole radiation

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