共查询到20条相似文献,搜索用时 15 毫秒
1.
Ren Zhao Yue-Qin Wu Li-Chun Zhang Huai-Fan Li 《The European Physical Journal C - Particles and Fields》2009,60(4):685-689
Applying the Damour–Ruffini method, we have considered the Hawking radiation of the five-dimensional rotating black hole.
When taking the energy conservation and angular momentum conservation into consideration and considering the reaction of the
radiation of the particle to spacetime, we see that the exact radiation spectrum is not purely thermal and the angular momentum
of the black hole is quantized. 相似文献
2.
Hawking radiation as tunneling and the unified first law of thermodynamics at the apparent horizon of the FRW universe 下载免费PDF全文
Relations between the tunneling rate FRW universe are investigated. The namics in such a dynamical system. first law of thermodynamics through and the unified first law of thermodynamics at the apparent horizon of the tunneling rate arises as a consequence of the unified first law of thermodyAnalysis shows how the tunneling is intimately connected with the unified the principle of conservation of energy. 相似文献
3.
4.
In this Letter we make a critique of, and comparison between, the anomaly method and WKB/tunneling method for obtaining radiation from non-trivial spacetime backgrounds. We focus on Rindler spacetime (the spacetime of an accelerating observer) and the associated Unruh radiation since this is the prototype of the phenomena of radiation from a spacetime, and it is the simplest model for making clear subtle points in the tunneling and anomaly methods. Our analysis leads to the following conclusions: (i) neither the consistent and covariant anomaly methods gives the correct Unruh temperature for Rindler spacetime and in some cases (e.g. de Sitter spacetime) the consistent and covariant methods disagree with one another; (ii) the tunneling method can be applied in all cases, but it has a previously unnoticed temporal contribution which must be accounted for in order to obtain the correct temperature. 相似文献
5.
The anomaly cancelation method proposed by Wilczek et al. is applied to the black holes of topologically massive gravity (TMG) and topologically massive gravito-electrodynamics (TMGE). Thus the Hawking temperature and fluxes of the ACL and ACGL black holes are found. The Hawking temperatures obtained agree with the surface gravity formula. Both black holes are rotating and this gives rise to appropriate terms in the effective U(1) gauge field of the reduced (1+1)-dimensional theory. It is found that the terms in this U(1) gauge field correspond exactly to the correct angular velocities on the horizon of both black holes as well as the correct electrostatic potential of the ACGL black hole. So the results for the Hawking fluxes derived here from the anomaly cancelation method, are in complete agreement with the ones obtained from integrating the Planck distribution. 相似文献
6.
Recently, a Hamilton–Jacobi method beyond the semiclassical approximation in black hole physics was developed by Banerjee
and Majhi. We generalize their analysis of black holes to the case of a Friedmann–Robertson–Walker (FRW) universe. It is shown
that all the higher order quantum corrections in the single particle action are proportional to the usual semiclassical contribution.
The corrections to the Hawking-like temperature and entropy of the apparent horizon for the FRW universe are also obtained.
In the corrected entropy, the area law involves a logarithmic area correction together with the standard term with the inverse
power of the area. 相似文献
7.
Sayan K. Chakrabarti Pulak Ranjan Giri Kumar S. Gupta 《The European Physical Journal C - Particles and Fields》2009,60(2):169-173
We analyze the possibility of inequivalent boundary conditions for a scalar field propagating in the BTZ black-hole space-time.
We find that for certain ranges of the black-hole parameters, the Klein–Gordon operator admits a one-parameter family of self-adjoint
extensions. For this range, the BTZ space-time is not quantum mechanically complete. We suggest a physically motivated method
for determining the spectra of the Klein–Gordon operator. 相似文献
8.
Yun Soo Myung Myungseok Yoon 《The European Physical Journal C - Particles and Fields》2009,62(2):405-411
We find a new black hole in three-dimensional anti-de Sitter space by introducing an anisotropic perfect fluid inspired by
the noncommutative black hole. This is a regular black hole with two horizons. We compare the thermodynamics of this black
hole with that of a non-rotating BTZ black hole. The first-law of thermodynamics is not compatible with the Bekenstein–Hawking
entropy. 相似文献
9.
We extend the method of Kerr/CFT correspondence recently proposed in arXiv:0809.4266 [hep-th] to the extremal (charged) Kerr black hole embedded in the five-dimensional Gödel universe. With the aid of the central charges in the Virasoro algebra and the Frolov–Thorne temperatures, together with the use of the Cardy formula, we have obtained the microscopic entropies that precisely agree with the ones macroscopically calculated by Bekenstein–Hawking area law. 相似文献
10.
By fully exploiting the existence of the unitarily inequivalent representations of quantum fields, we exhibit the entanglement between inner and outer particles, with respect to the event horizon of a black hole. We compute the entanglement entropy and we find that the non-unitarity of the mapping, between the vacua in the flat and the curved frames, makes the entanglement very robust. 相似文献
11.
Molin Liu Jianbo Lu Yuanxing Gui 《The European Physical Journal C - Particles and Fields》2009,59(1):107-116
On the basis of the 4D momentum, the influence of quintessence on the gravitational frequency shift and the deflection of
light are examined in modified Schwarzschild space. We find that the frequency of a photon depends on the state parameter
of the quintessence w
q: the frequency increases for −1<w
q<−1/3 and decreases for −1/3<w
q<0. Meanwhile, we adopt an integral power number a (a=3ω
q+2) to solve the orbital equation of photon. The photon’s potentials become higher with the decrease of ω
q. The behavior of the bending light sensitively depends on the state parameter ω
q. In particular, for the case of ω
q=−1, there is no influence on the deflection of light by quintessence. Furthermore, according to the H-masers of the GP-A
redshift experiment and long-baseline interferometry, the constraints on the quintessence field in the solar system are presented
here. 相似文献
12.
Yun Soo Myung Yong-Wan Kim Young-Jai Park 《The European Physical Journal C - Particles and Fields》2008,58(2):337-346
We investigate the Gauss–Bonnet black hole in five dimensional anti-de Sitter spacetimes (GBAdS). We analyze all thermodynamic
quantities of the GBAdS, which is characterized by the Gauss–Bonnet coupling c and mass M, comparing with those of the Born–Infeld-AdS (BIAdS), Reissner–Norstr?m-AdS black holes (RNAdS), Schwarzschild-AdS (SAdS),
and BTZ black holes. For c<0 we cannot obtain the black hole with positively definite thermodynamic quantities of mass, temperature, and entropy, because
the entropy does not satisfy the area law. On the other hand, for c>0, we find the BIAdS-like black hole, showing that the coupling c plays the role of a pseudo-charge. Importantly, we could not obtain the SAdS in the limit of c→0, which means that the GBAdS is basically different from the SAdS. In addition, we clarify the connections between thermodynamic
and dynamical stability. Finally, we also conjecture that if a black hole is big and thus globally stable, its quasi-normal
modes may take on analytic expressions. 相似文献
13.
Fei Yu Molin Liu Yuanxing Gui 《The European Physical Journal C - Particles and Fields》2009,60(2):175-179
We employ the metric of Schwarzschild space surrounded by quintessential matter to study the trajectories of test masses on
the motion of a binary system. The results, which are obtained through the gradually approximate approach, can be used to
search for dark energy via the difference of the azimuth angle of the pericenter. The classification of the motion is discussed. 相似文献
14.
Josevi de S. Carvalho E. Passos Claudio Furtado Fernando Moraes 《The European Physical Journal C - Particles and Fields》2008,57(4):817-822
The relativistic quantum dynamics of a spinorial quantum particle in the presence of a chiral conical background is investigated.
We study the gravitational Berry geometric quantum phase acquired by a spin 1/2 particle in the chiral cosmic string spacetime.
We obtain the result that this phase depends on the global features of this spacetime. We also consider the case that a string
possesses an internal magnetic flux and obtain the geometric quantum phase in this case. The spacetime of multiple chiral
cosmic strings is considered and the relativistic Berry quantum phase is also obtained. 相似文献
15.
U. Nordbrock R. Kienzler 《The European Physical Journal D - Atomic, Molecular, Optical and Plasma Physics》2007,44(3):407-410
Conservation laws are a recognized tool in physical- and engineering sciences.
The classical procedure to construct conservation laws is to apply
Noether's Theorem. It requires the existence of a Lagrange-function for
the system under consideration.
Two unknown sets of functions have to be found.
A broader class of such laws is obtainable, if Noether's Theorem is used together
with the Bessel-Hagen extension, raising the number of sets of
unknown functions to three.
By using the recently developed
Neutral-Action Method, the same conservation laws can be obtained by calculating only one unknown set of
functions.
Moreover the Neutral Action Method can also be applied in the absence of a
Lagrangian, since only the governing differential equations are required for this procedure.
In the paper, an application of this method to the Schr?dinger equation is presented. 相似文献
16.
We show that the recent tunneling formulas for black hole radiation in static, spherically symmetric spacetimes follow as a consequence of the first law of black hole thermodynamics and the area-entropy relation based on the radiation temperature. A tunneling formula results even if the radiation temperature is different from the one originally derived by Hawking and this is discussed in the context of the recent factor of 2 problem. In particular, it is shown that if the radiation temperature is higher than the Hawking temperature by a factor of two, thermodynamics then leads to a tunneling formula which is exactly the one recently found to be canonically invariant. 相似文献
17.
We investigate the tunnelling radiation of charged and magnetized massive particles from a Banados-Teitelboim- Zanelli (BTZ) black hole by extending the Parikh-Wilczek tunnelling framework. In order to calculate the emission rate, we reconstruct the electromagnetic field tensor and the Lagrangia~n of the field corresponding to the source with electric and magnetic charges, and treat the charges as an equivalent electric charge for simplicity in the later calculation. The result supports Parikh-Wilczek's conclusion, that is, the Hawking thermal radiation actually deviates from perfect thermality and agrees with an underlying unitary theory. 相似文献
18.
Statistical-Mechanical Entropy of a Black Hole with a Global Monopole to All Orders in Planck Length 下载免费PDF全文
Considering corrections to all orders in the Planck length on the quantum state density from the generalized uncertainty principle, we calculate the statistical entropy of the scalar field in the global monopole black hole spacetime without any artificial cutoff. It is shown that the entropy is proportional to the horizon area. 相似文献
19.
Robinson–Wilczek's recent work shows that, the energy–momentum tensor flux required to cancel gravitational anomaly at the event horizon of a Schwarzschild-type black hole has an equivalent form to that of a (1+1)-dimensional blackbody radiation at the Hawking temperature. Motivated by their work, Hawking radiation from the cosmological horizons of the general Schwarzschild–de Sitter and Kerr–de Sitter black holes, has been studied by the method of anomaly cancellation. The result shows that the absorbing gauge current and energy momentum tensor fluxes required to cancel gauge and gravitational anomalies at the cosmological horizon are precisely equal to those of Hawking radiation from it. It should be emphasized that the effective field theory for generic black holes in de Sitter spaces should be formulated within the region between the event horizon (EH) and the cosmological horizon (CH), to integrate out the classically irrelevant ingoing modes at the EH and the classically irrelevant outgoing modes at the CH, respectively. 相似文献
20.
R. Aldrovandi R. R. Cuzinatto L. G. Medeiros 《The European Physical Journal C - Particles and Fields》2008,58(3):483-497
Equations of state for the early universe including realistic interactions between constituents are formulated. Under certain
hypotheses, these equations are able to generate an inflationary regime prior to the period of the nucleosynthesis. The resulting
accelerated expansion is intense enough to solve the flatness and horizon problems. In the cases of a curvature parameter
κ equal to 0 or +1, the model is able to avoid the initial singularity and offers a natural explanation for why the universe
is in expansion. All the results are valid only for a matter–antimatter symmetric universe. 相似文献