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1.
Using the Hamilton-Jacobi method, Hawking radiation from the apparent horizon of a dynamical Vaidya black hole is calculated. The black hole thermodynamics can be built successfully on the apparent horizon. If a relativistic perturbation is given to the apparent horizon, a similar calculation can also lead to a purely thermal spectrum, which corresponds to a modified temperature from the former. The first law of thermodynamics can also be constructed successfully at a new supersurface which has a small deviation from the apparent horizon. When the event horizon is thought as such a deviation from the apparent horizon, the expressions of the characteristic position and temperature are consistent with the previous result that asserts that thermodynamics should be built on the event horizon. It is concluded that the thermodynamics should be constructed on the apparent horizon exactly while the event horizon thermodynamics is just one of the perturbations near the apparent horizon. 相似文献
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Considering the back-reaction of emitting particles to the black hole, a “new” horizon is suggested where thermodynamics can
be built in the dynamical black hole. It, at least, means that the thermodynamics of a dynamical black hole should not be
constructed at the original event horizon any more. The temperature, “new” horizon position and radiating particles’ energy
will be consistent again under the theory of equilibrium thermodynamical system.
相似文献
5.
Taking a black hole as a black body system, using general
black body radiation theory, a Schwarzschild black hole and a
Kerr--Newman black hole are investigated respectively. It is
concluded that a black hole can be regarded as an ideal general
black body system exactly for the changing process only. However, a
stationary global black hole cannot be smoothly regarded as a general black
body system. A black hole has some special characteristics which
different from a general thermodynamics system. This conclusion means
that a black hole should be inherently dynamical, at least when it is
taken as a black body system. 相似文献
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Hawking radiation from the charged and magnetized BTZ black hole via covariant anomaly 总被引:1,自引:0,他引:1 下载免费PDF全文
This paper discusses Hawking radiation from the charged and
magnetized Ba?ados--Teitelboim--Zanelli (BTZ) black hole from
the viewpoint of anomaly, initiated by Robinson and Wilczek
recently. It reconstructs 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. It employs the covariant anomaly cancellation method to
determine the compensating fluxes of charge flow and energy-momentum
tensor, which are shown to match with those of the 2-dimensional
blackbody radiation at the Hawking temperature exactly. 相似文献
7.
Hawking radiation from the with a global monopole via Schwarzschild black hole gravitational anomaly 下载免费PDF全文
This paper derives the Hawking flux from the Schwarzschild black hole with a global monopole by using Robinson and Wilczek's method. Adopting a dimensional reduction technique, it can describe the effective quantum field in the (3 + 1)-dimensional global monopole background by an infinite collection of the (1 + 1)-dimensional massless fields if neglecting the ingoing modes near the horizon, where the gravitational anomaly can be cancelled by the (1 + 1)- dimensional black body radiation at the Hawking temperature. 相似文献
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本文用一种新的乌龟坐标变换和改进的Damour-Ruffini方法研究了动态Kerr黑洞的Hawking辐射,得到了随时间和纬度角而变化的局域温度和具有准黑体谱形式的Hawking辐射谱.其结果与采用通常的乌龟坐标变换所得结果有所不同,而通常的乌龟坐标变换在量纲上存在一定的问题,本文的结果也许更为合理.
关键词:
Hawking辐射
动态Kerr黑洞
改进的Damour-Ruffini方法
新乌龟坐标变换 相似文献
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Li-Xin Li 《General Relativity and Gravitation》1996,28(10):1171-1175
A thermodynamical approach is used to solve the back-reaction problem of the Kerr black hole; the dressed mass, the dressed angular momentum, and the dressed entropy are calculated. 相似文献
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We promote the work of Parikh and Wilczek on the black hole radiation to the emission of massive and charged particles from
Garfinkle-Horowitz-Strominger black hole. The energy and charge of the space-time are conservational during the course of
the evaporation. The calculation shows that the emission spectrum is not precisely thermal, while has a correction, and the
conclusion supports the viewpoint of information conservation. 相似文献
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利用Parikh 和 Wilczek的隧穿模型,在Gibbons-Maeda dilaton 黑洞时空中,通过计算带有电荷和磁荷的粒子在事件视界上的隧穿概率,研究了该黑洞的Hawking辐射.在粒子的隧穿过程中,强调了时空的能量守恒和电磁荷守恒,考虑了隧穿粒子对背景时空的反作用.计算表明,在Gibbons-Maeda dilaton 黑洞时空中,带电磁荷的粒子通过事件视界的隧穿概率取决于粒子出射前后黑洞熵的变化.这表示,黑洞辐射过程中可以满足信息守恒和量子理论的幺正性.
关键词:
黑洞
霍金辐射
量子理论 相似文献
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Quantum nonthermal radiation and horizon surface gravity of an arbitrarily accelerating black hole with electric charge and magnetic charge 下载免费PDF全文
With a new tortoise coordinate transformation, we discussed the quantum nonthermal radiation characteristics near the event horizon by studying the Hamilton-Jacobi equation of a scalar particle in the curve space-time, and obtained the event horizon surface gravity and the Hawking temperature on the event horizon. The results showed that there is a crossing of particle energy near the event horizon. We derived the maximum overlap of the positive and negative energy levels. It was also found that the Hawking temperature of a black hole depends on not only the time, but also the angle. There is a problem of dimension in the usual tortoise coordinate, so the present results obtained by using a correct-dimension new tortoise coordinate transformation may be more reasonable. 相似文献
15.
Thomas Müller 《General Relativity and Gravitation》2008,40(10):2185-2199
Consider a radially freely falling observer who plunges into a Schwarzschild black hole. In contrast to a static observer,
he will have a different view of the black hole and of the outer sky. Furthermore, the relationship between the proper time
of the falling observer and the proper time of a distant static observer differs from the relationship between the proper
times of two static observers or two freely falling observers. 相似文献
16.
引入局域热平衡概念,用Damour-Ruffini方法和薄膜模型研究了缓变动态Kerr-Newman黑洞的Hawking辐射和熵.得到了黑洞的Hawking温度和辐射谱公式,Hawking温度随时间和视界面上的位置而变化,辐射谱为准黑体谱;计算了黑洞熵,当取与静态球对称黑洞情况相同的截断关系时便得到了黑洞的Bekenstein-Hawking熵.结果表明,缓变动态黑洞的温度是局域量,缓变动态黑洞的熵与稳态黑洞情况一样正比于黑洞视界面面积.
关键词:
缓变动态黑洞
Hawking辐射
黑洞熵 相似文献
17.
It is shown that the interaction of a class of positive energy tachyons decreases the area of the horizon of theT-S, ∂=3 metric even in the case of a reversible transformation (M
ir=constant). This is a violation of the second law of black hole physics. 相似文献
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The quantum nonthermal radiation and horizon surface gravity of an arbitrarily accelerating black hole with electric charge and magnetic charge 下载免费PDF全文
Using a new tortoise coordinate transformation,we discuss the quantum nonthermal radiation characteristics near an event horizon by studying the Hamilton-Jacobi equation of a scalar particle in curved space-time,and obtain the event horizon surface gravity and the Hawking temperature on that event horizon.The results show that there is a crossing of particle energy near the event horizon.We derive the maximum overlap of the positive and negative energy levels.It is also found that the Hawking temperature of a black hole depends not only on the time,but also on the angle.There is a problem of dimension in the usual tortoise coordinate,so the present results obtained by using a correct-dimension new tortoise coordinate transformation may be more reasonable. 相似文献
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We derive the metric for a Schwarzschild black hole with global monopole charge by relaxing asymptotic flatness of the Schwarzschild
field. We then study the effect of global monopole charge on particle orbits and the Hawking radiation. It turns out that
existence, boundedness and stability of circular orbits scale up by (1−8πη
2)−1, and the perihelion shift and the light bending by (1−8πη
2)−3/2, while the Hawking temperature scales down by (1−8πη
2)2 the Schwarzschild values. Hereη is the global charge. 相似文献
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This paper investigated the massive particle radiation from Gibbons-Maeda black hole by using a semi-classical method.The calculations showed that,if the self-gravitation of the radiated particle is taken into account,the radiation spectrum deviates from exact black body spectrum and the rate of tunneling equals precisely the exponent of the difference of the black hole entropies before and after emission.The conclusion supports the viewpoint of information conservation. 相似文献