共查询到20条相似文献,搜索用时 15 毫秒
1.
Based on the anomaly cancellation method, initiated by Robinson and Wilczek, we investigate Hawking radiation from the event horizon and cosmological horizon of the higher dimensional Reissner–Nordström–de Sitter black hole via covariant gauge and gravitational anomalies. Unlike in black hole space-time, to describe the observable physics, the effective field theory here is constructed between the event horizon and cosmological horizon. Our result shows that to restore the underlying gauge covariance and diffeomorphism covariance at the quantum level, the covariant compensating fluxes of gauge and energy–momentum tensor, which are shown to equal to those of Hawking radiation, should be radiated from the event horizon and absorbed from the cosmological horizon, respectively. 相似文献
2.
Yi-Wen Han Xiao-Xiong Zeng Shu-Zheng Yang 《International Journal of Theoretical Physics》2008,47(7):2011-2020
The recent work of Robinson and Wilczek that Hawking radiation can be determined by the compensating fluxes is extended to the charged and magnetized Reissner-Nordström de Sitter black hole. We reconstruct the electromagnetic field tensor and the Lagrangian of the field corresponding to the source with electric and magnetic charges to redefine an equivalent charge and gauge potential. We construct the effect field theory between the event horizon and cosmological horizon to respectively determine the compensating fluxes from them, which are shown to exactly equal to those of Hawking radiation, by the covariant anomaly cancellation conditions. 相似文献
3.
Xiao-Xiong Zeng Xiong-Wei Liu Shu-Zheng Yang 《General Relativity and Gravitation》2008,40(12):2533-2542
Hawking radiation of particles with electric and magnetic charges from the Einstein–Maxwell-Dilaton–Axion black hole is derived
via the anomaly cancellation method, initiated by Robinson and Wilczek and elaborated by Banerjee and Kulkarni recently. We
reconstruct the electromagnetic field tensor to redefine the gauge potential and equivalent charge corresponding to the source
with electric and magnetic charges. We only adopt the covariant gauge and gravitational anomalies to discuss the near-horizon
quantum anomaly in the dragging coordinate frame. Our result shows that Hawking radiation in this case also can be reproduced
from the viewpoint of anomaly. 相似文献
4.
After taking into account energy conservation and the particle’s self-gravitation interaction, Hawking radiation of the massive
particle as tunneling from Schwarzshild-anti-de Sitter black hole is studied by using Parikh-Wilczek’s semi-classical quantum
tunneling approach. Meanwhile, Hawking radiation as tunneling from the black hole is reexamined by developing Angheben–Nadalini–Vanzo–Zerbini
(ANVZ) covariant method to cover energy conservation and the particle’s self-gravitation interaction. Both the results perfectly
generalize those obtained by Parikh and Wilczek, and show that the tunneling rate is related to the change of Bekenstein-Hawking
entropy, and the factual emission spectrum is not exactly thermal, but satisfies the underlying unitary theory.
PACS: 04.70-s, 9760. Lf. 相似文献
5.
QI De-Jiang 《理论物理通讯》2011,56(6):1171-1174
The aim of this paper is to investigate Hawking radiation of Dirac particles from the Dilaton space-time with squashed horizons by improving the method of Kerner and Man's tunneling analysis. We construct appropriate matrices for general covariant Dirac equation, and derive the tunneling probability and Hawking temperature. The results show that both Dirac particles and scalar particles radiate at the same Hawking temperature. 相似文献
6.
Xiao-Xiong Zeng Kai Lin Shu-Zheng Yang 《International Journal of Theoretical Physics》2008,47(10):2533-2542
Very recently, a conceptually clean and economical anomaly cancellation method, based on the initial work of Robinson and
Wilczek, on Hawking radiation was proposed. On the basis of this formalism, we investigate Hawking radiation from the higher
dimensional Schwarzschild de Sitter and Anti-de Sitter black holes. To describe the observable physics in de Sitter space,
we construct the effective field theory between the event horizon and cosmological horizon. Our result shows that when the
underlying diffeomorphism symmetries are saved at the quantum level, Hawking radiation, from not only the event horizon but
also the cosmological horizon in the higher dimensional space time, can be determined by the covariant compensating fluxes
of energy momentum tensor. Meanwhile, we also discuss the exact radiation spectrum by incorporating the self-gravitational
interaction and back reaction of the outgoing modes. 相似文献
7.
Adopting the anomaly cancellation method, initiated by Robinson and
Wilczek recently, this paper discusses Hawking radiation from the
dilaton--(anti) de Sitter black hole. To save the underlying gauge
and general covariance, it introduces covariant fluxes of gauge and
energy--momentum tensor to cancel the gauge and gravitational
anomalies. The result shows that the introduced compensating fluxes
are equivalent to those of a 2-dimensional blackbody radiation at
Hawking temperature with appropriate chemical potential. 相似文献
8.
We show, using a covariant and gauge– invariant approach to cosmological perturbation theory, that velocity and gravitational wave perturbations of the Friedmann– Lemaître– Robertson– Walker (FLRW) model can lead to the generation and amplification of cosmic magnetic fields. It is argued that under certain conditions these fields can reach strengths capable of supporting the galactic dynamo mechanism. 相似文献
9.
Recently, Banerjee and Kulkarni (R. Banerjee, S. Kulkarni, arXiv: 0707. 2449 [hep-th]) suggested that it is conceptually clean
and economical to use only the covariant anomaly to derive Hawking radiation from a black hole. Based upon this simplified
formalism, we apply the covariant anomaly cancellation method to investigate Hawking radiation from a modified Schwarzschild
black hole in the theory of rainbow gravity. Hawking temperature of the gravity’s rainbow black hole is derived from the energy-momentum
flux by requiring it to cancel the covariant gravitational anomaly at the horizon. We stress that this temperature is exactly
the same as that calculated by the method of cancelling the consistent anomaly. 相似文献
10.
A time dependent “cosmological constant” Λ(t) is conjectured, in terms of the Gaussian curvature of the causal horizon. It
is nonvanishing even in Minkowski space because of the lack of informations beyond the light cone. Using the Heisenberg Principle,
the corresponding energy of the quantum fluctuations localized on the past or future null horizons is proportional to Λ1/2.
We compute Λ(t) for the (Lorenzian version) of the (conformally flat) Hawking wormhole geometry (written in static spherical
Rindler coordinates) and for the de Sitter spacetime. A possible explanation of the Hawking temperature is proposed, in terms
of a constant Λ. 相似文献
11.
Hawking radiation from the cylindrical symmetric black hole, which is asymptotically anti-de Sitter not only in the transverse
direction but also in the string or membrane direction, is discussed from the anomaly point of view. We implement the covariant
anomaly cancellation method, the more refined formalism that was proposed by Banerjee and Kulkarni recently than the initial
work of Robinson et al., to discuss the near-horizon gauge and gravitational anomalies. Our result shows that Hawking radiation
from the cylindrical configurations with horizons also can be reproduced by the anomaly cancellation method. 相似文献
12.
An event horizon for “relativistic” fermionic quasiparticles can be constructed in a thin film of superfluid 3He-A. The quasiparticles see an effective “gravitational” field which is induced by a topological soliton of the order parameter.
Within the soliton the “speed of light” crosses zero and changes sign. When the soliton moves, two planar event horizons (black
hole and white hole) appear, with a curvature singularity between them. Aside from the singularity, the effective spacetime
is incomplete at future and past boundaries, but the quasiparticles cannot escape there because the nonrelativistic corrections
become important as the blueshift grows, yielding “superluminal” trajectories. The question of Hawking radiation from the
moving soliton is discussed but not resolved.
Pis’ma Zh. éksp. Teor. Fiz. 68, No. 11, 833–838 (10 December 1998)
Published in English in the original Russian journal. Edited by Steve Torstveit. 相似文献
13.
Verlinde’s recent work, which showed that gravity may be explained as entropic force caused by the changes of information
associated with the positions of material bodies, is extended to study the Unruh–Verlinde temperature and energy of a static
spherically symmetric charged black hole. The results indicate that the Unruh–Verlinde temperature is equal to the Hawking
temperature at the outer and inner horizons. The energy is dependent on the radius of the screen, which is also a consequence
of the Gauss’ laws of gravity and electrostatics. 相似文献
14.
In this letter we compute the corrections to the horizons, the horizon area and Hawking temperature of a BTZ black hole. These
corrections stem from the space non-commutativity. We show that in non-commutative case, non-rotating BTZ black hole in contrast
with commutative case has two horizons. 相似文献
15.
16.
Charged massive scalar fields are considered in the gravitational and electromagnetic field produced by a dyonic black hole with a cosmic string along its axis of symmetry. Exact solutions of both angular and radial parts of the covariant Klein–Gordon equation in this background are obtained, and are given in terms of the confluent Heun functions. The role of the presence of the cosmic string in these solutions is showed up. From the radial solution, we obtain the exact wave solutions near the exterior horizon of the black hole, and discuss the Hawking radiation spectrum and the energy flux. 相似文献
17.
Alex B. Nielsen 《General Relativity and Gravitation》2009,41(7):1539-1584
We investigate whether black holes can be defined without using event horizons. In particular we focus on the thermodynamic
properties of event horizons and the alternative, locally defined horizons. We discuss the assumptions and limitations of
the proofs of the zeroth, first and second laws of black hole mechanics for both event horizons and trapping horizons. This
leads to the possibility that black holes may be more usefully defined in terms of trapping horizons. We also review how Hawking
radiation may be seen to arise from trapping horizons and discuss which horizon area should be associated with the gravitational
entropy. 相似文献
18.
19.
Hawking radiation of a particle with electric and magnetic charges from the Kerr-Newman-Kasuya black hole is discussed in
the dragging coordinate frame via the anomaly cancellation method, initiated by Robinson and Wilczek. We redefine an equivalent
charge of the charged and magnetized black hole by reconstructing the electromagnetic field tensor. We adopt the refined covariant
anomaly cancellation method to determining the compensating fluxes of charge flow and energy momentum tensor, which are proved
to precisely match with those of the 2-dimensional blackbody radiation at the Hawking temperature with an appropriate chemical
potential. 相似文献
20.
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