共查询到20条相似文献，搜索用时 31 毫秒
1.
M. Atiqur Rahman 《Astrophysics and Space Science》2014,350(2):713-719
Following the Parikh and Wilczek semiclassical tunneling method of massless particle, hawking radiation of Schwarzschild-de Sitter (SdS) black hole have been computed using null geodesic method. Purely thermal and quantum gravity corrections have been made and have shown that both the corrections give the same results and all the tunneling rates are related to change of Bekenstein-Hawking entropy of SdS black hole. The results obtained for SdS black hole are also in accordance with Parikh and Wilczek’s opinion and gives a correction to the Hawking radiation of SdS black hole. 相似文献
2.
Using the new global embedding approach and analytical continuation method of wave function we discuss Hawking radiation of
acoustic black holes. Unruh/Hawking temperature of the dielectric black hole is derived. The corresponding relation among
these methods that calculate Hawking radiation of dielectric black hole is established. Our result shows that these methods
are equivalent. 相似文献
3.
We study the effects of the generalized uncertainty principle in the tunneling formalism for Hawking radiation to evaluate the quantum-corrected Hawking temperature and entropy for a Kerr black hole. By assumption of a spatially flat universe accompanied with expansion of metric, the modified area and entropy of Kerr black hole are calculated and we could obtain an expression for entropy of black hole that is changing with respect to time and Bekenstein-Hawking temperature. 相似文献
4.
In this study, we explore a particular type Hawking radiation which ends with zero temperature and entropy. The appropriate black holes for this purpose are the linear dilaton black holes. In addition to the black hole choice, a recent formalism in which the Parikh-Wilczek’s tunneling formalism amalgamated with quantum corrections to all orders in ? is considered. The adjustment of the coefficients of the quantum corrections plays a crucial role on this particular Hawking radiation. The obtained tunneling rate indicates that the radiation is not pure thermal anymore, and hence correlations of outgoing quanta are capable of carrying away information encoded within them. Finally, we show in detail that when the linear dilaton black hole completely evaporates through such a particular radiation, entropy of the radiation becomes identical with the entropy of the black hole, which corresponds to “no information loss”. 相似文献
5.
T. Ibungochouba Singh 《Astrophysics and Space Science》2013,347(2):271-276
Hawking radiation effect of Maxwell’s electromagnetic fields in the Kerr-Newman black hole space-time is investigated using two different tortoise coordinate transformations. It has been shown that the new tortoise coordinate transformation produces constant term ξ in the expression of surface gravity and Hawking temperature. If ξ is set to zero, the surface gravity and Hawking temperature will be equal to those obtained from the old tortoise coordinate transformation. This indicates that new transformation is more reliable and accurate. The black body radiant spectrum of photon displays a new spin-rotation coupling effect. 相似文献
6.
We have investigated Hawking non-thermal and purely thermal Radiations of Reissner Nordström anti-de Sitter (RNAdS) black hole by massive particles tunneling method. The spacetime background has taken as dynamical, incorporate the self-gravitation effect of the emitted particles the imaginary part of the action has derived from Hamilton-Jacobi equation. We have supposed that energy and angular momentum are conserved and have shown that the non-thermal and thermal tunneling rates are related to the change of Bekenstein-Hawking entropy and the derived emission spectrum deviates from the pure thermal spectrum. The results for RNAdS black hole is also in the same manner with Parikh and Wilczek’s opinion and explored the new result for Hawking radiation of RNAdS black hole. 相似文献
7.
The massive particles tunneling method has been used to investigate the Hawking non-thermal and purely thermal radiations of Schwarzschild Anti-de Sitter (SAdS) black hole. Considering the spacetime background to be dynamical, incorporate the self-gravitation effect of the emitted particles the imaginary part of the action has been derived from Hamilton-Jacobi equation. Using the conservation laws of energy and angular momentum we have showed that the non-thermal and purely thermal tunneling rates are related to the change of Bekenstein-Hawking entropy and the derived emission spectrum deviates from the pure thermal spectrum. The result obtained for SAdS black hole is also in accordance with Parikh and Wilczek’s opinion and gives a correction to the Hawking radiation of SAdS black hole. 相似文献
8.
A. Farmany 《Astrophysics and Space Science》2012,339(1):131-134
In the recent interest to the quantum black hole spectroscopy, we calculate the quantum gravity effects to Hawking radiation.
In the view of our calculation, the quantum black hole radiation is a stimulated emission. 相似文献
9.
Hawking effect from a dynamical Kerr black hole is investigated using the improved Damour-Ruffini method with a new tortoise
coordinate transformation. Hawking temperature of the black hole can be obtained point by point at the event horizon. It is
found that Hawking temperatures of different points on the surface are different. Moreover, the temperature does not turn
to zero while the dynamical black hole turns to an extreme one. 相似文献
10.
11.
Mahamat Saleh Bouetou Thomas Bouetou Timoleon Crepin Kofane 《Astrophysics and Space Science》2011,333(2):449-455
We investigate quasinormal modes (QNMs) and Hawking radiation of a Reissner-Nordström black hole surrounded by quintessence. The Wentzel-Kramers-Brillouin (WKB) method is used to evaluate the QNMs and the rate of radiation. The results show that due to the interaction of the quintessence with the background metric, the QNMs of the black hole damp more slowly when increasing the density of quintessence and the black hole radiates at slower rate. 相似文献
12.
The Hawking radiation is considered as a quantum tunneling process, which can be studied in the framework of the Hamilton–Jacobi method. In this study, we present the wave equation for a mass generating massive and charged scalar particle (boson). In sequel, we analyse the quantum tunneling of these bosons from a generic 4-dimensional spherically symmetric black hole. We apply the Hamilton–Jacobi formalism to derive the radial integral solution for the classically forbidden action which leads to the tunneling probability. To support our arguments, we take the dyonic Reissner–Nordström black hole as a test background. Comparing the tunneling probability obtained with the Boltzmann formula, we succeed in reading the standard Hawking temperature of the dyonic Reissner–Nordström black hole. 相似文献
13.
Using the analytic extension method, we study Hawking radiation of an (n+4)-dimensional Schwarzschild-de Sitter black hole. Under the condition that the total energy is conserved, taking the reaction of the radiation of particles to the spacetime into consideration and considering the relation between the black hole event horizon and cosmological horizon, we obtain the radiation spectrum of de Sitter spacetime. This radiation spectrum is no longer a strictly pure thermal spectrum. It is related to the change of the Bekenstein-Hawking (B-H) entropy corresponding the black hole event horizon and cosmological horizon. The result satisfies the unitary principle. At the same time, we also testify that the entropy of de Sitter spacetime is the sum of the entropy of black hole event horizon and the one of cosmological horizon. 相似文献
14.
Mario Rabinowitz 《Astrophysics and Space Science》1998,262(4):391-410
Small, quiescent black holes can be considered as candidates for the missing dark matter of the universe, and as the core
energy source of ball lightning. By means of gravitational tunneling, unidirectional radiation is emitted from black holes
in a process much attenuated from that of Hawking radiation, P, which has proven elusive to detect. Gravitational tunneling
emission is similar to electric field emission of electrons from a metal in that a second body is involved which lowers the
barrier and gives the barrier a finite rather than infinite width. Hawking deals with a single isolated black hole. The radiated
power here is P ∝ e-2Δγ P, where e-2Δγ is the transmission probability.
This revised version was published online in August 2006 with corrections to the Cover Date. 相似文献
15.
Recently, Umetsu applied the tunneling method to the research on Hawking radiation of black holes using the dimensional reduction method near the horizon. In a simple way he obtained the radiation temperature of Kerr-Newman black hole. In this paper, using the dimensional reduction method near the horizon, we apply the tunneling method to the research on Hawking radiation of a general Kerr-de Sitter metrics in all dimensions. Our results support the views of Umetsu and extend the tunneling method proposed by Parikh and Wilczek. 相似文献
16.
Michael A. Dopita Marcella Marconi Gisella Clementini Enzo Brocato 《Astrophysics and Space Science》2012,338(1):1-2
In recent papers we had developed a unified picture of black hole entropy and curvature which was shown to lead to Hawking
radiation. It was shown that for any black hole mass, holography implies a phase space of just one quantum associated with
the interior of the black hole. Here we study extremal rotating and charged black holes and obtain unique values for ratios
of angular momentum to entropy, charge to entropy, etc. It turns out that these ratios can be expressed in terms of fundamental
constants in nature, having analogies with other physical systems, like in condensed matter physics. 相似文献
17.
A direct method for calculating the temperature of a hawking particle is carried out. Study of the quantum gravity effects
on the hawking radiation is made by imposing a generalized time energy uncertainty principle. It is shown that the Hawking
radiation of mini black hole is hotter than the hawking calculations. 相似文献
18.
Vilkovisky has claimed to have solved the black hole backreaction problem and finds that black holes lose only ten percent
of their mass to Hawking radiation before evaporation ceases. We examine the implications of this scenario for cold dark matter,
assuming that primordial black holes are created during the reheating period after inflation. The mass spectrum is expected
to be dominated by 10-gram black holes. Nucleosynthesis constraints and the requirement that the earth presently exist do
not come close to ruling out such black holes as dark matter candidates. They also evade the demand that the photon density
produced by evaporating primordial black holes does not exceed the present cosmic radiation background by a factor of about
one thousand. 相似文献
19.
T. Ibungochouba Singh I. Ablu Meitei K. Yugindro Singh 《Astrophysics and Space Science》2013,345(1):177-181
Hawking radiation of Kerr-de Sitter black hole is investigated using Hamilton-Jacobi method. When the well-behaved Painleve coordinate system and Eddington coordinate are used, we get the correct result of Bekenstein-Hawking entropy before and after radiation but a direct computation will lead to a wrong result via Hamilton-Jacobi method. Our results show that the tunneling probability is related to the change of Bekenstein-Hawking entropy and the derived emission spectrum deviates from the pure thermal but it is consistent with underlying unitary theory. 相似文献
20.
Wenbiao Liu 《Astrophysics and Space Science》2007,310(1-2):81-84
Hawking radiation can be viewed as a process of particle quantum tunneling near a black hole horizon. When a particle with
angular momentum tunnels across the event horizon of a Reissner–Nordstrom black hole, the black hole will change into a Kerr–Newman
one. In previous papers, axisymmetric black hole has been studied only when a keeps constant. Changing from Reissner–Nordstrom to Kerr–Newman should be a simple case when a varies. After this, more general radiation including changed a in Kerr or Kerr–Newman spacetimes can be studied in the future. The emission rate of the massless particles with angular
momentum is calculated, and the result is consistent with an underlying unitary theory.
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