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1.
采用两种新的乌龟坐标变换,用改进的Damour-Ruffini方法研究了动态Kinnersley黑洞的Hawking辐射.在新乌龟坐标变换下,将Klein-Gordon方程在视界附近变换成平直时空的标准波动方程形式,得到了黑洞的表面引力及Hawking温度,该温度在黑洞表面不同点有不同的值.值得注意的是,旧的乌龟坐标变换存在量纲错误,新乌龟坐标变换没有量纲问题,选不同的旧乌龟坐标变换计算同一黑洞所得结果不同,但是采用不同的新乌龟坐标变换所得结果仍然不同.
关键词:
黑洞
乌龟坐标变换
Hawking辐射
Klein-Gorden方程 相似文献
2.
Xin-Qin Gao Li-E Qiang Jian-Yang Zhu Zheng Zhao 《General Relativity and Gravitation》2004,36(11):2511-2523
By reducing the Klein-Gordon equation near the event horizon with a new tortoise coordinate transformation, we calculate the Hawking temperature of the arbitrarily accelerating Kinnersley black hole. The temperature is a little different from what we have when we select the usual tortoise coordinate transformation. Then by means of the thin film model, we obtain the Bekenstein Hawking entropy of the Kinnersley black hole, which is proportional to the area of its event horizon with the same cut-off relation as the static case. 相似文献
3.
Hawking effect and quantum nonthermal radiation of an arbitrarily accelerating charged black hole using a new tortoise coordinate transformation
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Using a new tortoise coordinate transformation, this paper investigates the Hawking effect from an arbitrarily accelerating charged black hole by the improved Damour-Ruffini method. After the tortoise coordinate transformation, the Klein-Gordon equation can be written as the standard form at the event horizon. Then extending the outgoing wave from outside to inside of the horizon analytically, the surface gravity and Hawking temperature can be obtained automatically. It is found that the Hawking temperatures of different points on the surface are different. The quantum nonthermal radiation characteristics of a black hole near the event horizon is also discussed by studying the Hamilton-Jacobi equation in curved spacetime and the maximum overlap of the positive and negative energy levels near the event horizon is given. There is a dimensional problem in the standard tortoise coordinate and the present results may be more reasonable. 相似文献
4.
The quantum nonthermal radiation and horizon surface gravity of an arbitrarily accelerating black hole with electric charge and magnetic charge
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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
5.
Quantum nonthermal radiation and horizon surface gravity of an arbitrarily accelerating black hole with electric charge and magnetic charge
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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
6.
Xiao-Gang Lan 《International Journal of Theoretical Physics》2013,52(5):1682-1687
By introducing a new tortoise coordinate transformation, we apply Damour-Ruffini-Sannan method to study the Hawking radiation of massive scalar particles in a dynamic Dilaton-Maxwell black hole. We find that Hawking radiation spectrum shows still the blackbody one, while the Hawking temperature is significantly changed. Additionally, by adopting the thin film method, we calculate the entropy of a dynamic Dilaton-Maxwell black hole. The result indicates that the entropy for such a black hole is still in proportional to the area of its event horizon. 相似文献
7.
Zhong-Wen Feng Juan Deng Guo-Ping Li Shu-Zheng Yang 《International Journal of Theoretical Physics》2012,51(10):3214-3221
In this paper, the quantum tunneling of the non-stationary Kerr-Newman black hole is investigated via Hamilton-Jacobi equation and two types of general tortoise coordinate transformations. The tunneling rates, the Hawking temperatures and radiation spectrums are derived respectively. Our result shows that the new type of general tortoise coordinate transformation is more reasonable. 相似文献
8.
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
9.
10.
Hawking evaporation of photons in a variable-mass Kerr space-time is investigated by using a method of the generalized tortoise coordinate transformation. The blackbody radiant spectrum of photons displays a new spin-rotation coupling effect obviously dependent on different helicity states of photons. 相似文献
11.
Han Yan 《International Journal of Theoretical Physics》2014,53(1):194-202
Simplifying Dirac equation near the horizon, Hawking temperature is obtained by applying a new tortoise coordinate transformation. Using the improved thin film brick-wall model and WKB approximation, the entropy of Dirac field in the non-stationary and slowly changing Reissner-Nordström black hole is calculated. The result shows that the entropy of the black hole is still proportional to the horizon area, and black hole entropy is just identical to the entropy of the quantum state at the horizon. In addition, the new tortoise coordinate transformation can make the cut-off parameter introduced in solving the entropy of non-stationary black hole simplified to the same as that in the static and stationary cases. 相似文献
12.
Hawking radiation of Klein-Gordon and Dirac particles in a non-stationary Kerr-Newman-de-Sitter black hole is studied by introducing a new tortoise coordinate transformation. The result shows that the Fermi-Dirac radiant spectrum displays a new term that represents the interaction between the spin of spinor particles and the rotation of black holes, which is absent in the Bose-Einstein distribution of Klein-Gordon particles. 相似文献
13.
Hawking evaporation of photons in a Vaidya–de Sitter black hole is investigated by using the method of generalized tortoise coordinate transformation. Both the location and the temperature of the event horizon depend on the time. It is shown that Hawking radiation of photons exists only for the complex Maxwell scalar 0 in the advanced Eddington–Finkelstein coordinate system. This asymmetry of Hawking radiation for different components of Maxwell fields probably arises from the asymmetry of spacetime in the advanced Eddington–Finkelstein coordinate system. It is shown that the black body radiant spectrum of photons resembles that of Klein–Gordon particles. 相似文献
14.
采用新的广义乌龟坐标变换,利用薄膜brick-wall模型.讨论了球对称动态黑洞Driac场的Hawking温度和熵,由于k因子的变化,使Hawking温度有一定影响,而截断因子不再因时空结构不同而异,变得与稳态情况相同.
关键词:
广义乌龟坐标变换
薄膜brick-wall模型
Driac场
熵 相似文献
15.
X. G. Lan Q. Q. Jiang L. F. Wei 《The European Physical Journal C - Particles and Fields》2012,72(4):1983
We apply the Damour–Ruffini–Sannan method to study the Hawking radiations of scalar and Dirac particles in non-stationary
Kerr black holes under different tortoise coordinate transformations. We found that all the relevant Hawking radiation spectra
show still the blackbody ones, while the Hawking temperatures are strongly related to the used tortoise coordinate transformations.
The properties of these dependences are discussed analytically and numerically. Our results imply that proper selections of
tortoise coordinate transformations should be important in the studies of Hawking radiations and the correct selection would
be given by the experimental observations in the future. 相似文献
16.
Xian-Ming Liu Su-Jun Cheng Wen-Biao Liu 《International Journal of Theoretical Physics》2012,51(2):518-525
Under the extended dynamical tortoise coordinate transformation, Damour-Ruffini method has been applied to calculate the charged
particles’ Hawking radiation from the apparent horizon of a dynamical Kerr-Newman black hole. It is shown that Hawking radiation
is still purely thermal black body spectrum. Moreover, the temperature of Hawking radiation is corresponding to the apparent
horizon surface gravity and the first law of thermodynamics can also be constructed successfully on the apparent horizon in
the dynamical Kerr-Newman black hole. 相似文献
17.
Using the Hamilton-Jacobi equation of a scalar particle in the curve space-time and a correct- dimension new tortoise coordinate transformation, the quantum nonthermal radiation of the Vaidya-Bonner-de Sitter black hole is investigated. The energy condition for the occurrence of the Starobinsky-Unruh process is obtained. The event horizon surface gravity and the Hawking temperature on the event horizon are also given. 相似文献
18.
The Hawking radiation of Dirac particles in a charged Vaidya–de Sitter black hole is investigated by using the method of generalized tortoise coordinate transformation. It is shown that the Hawking radiation of Dirac particles does not exist for P1, Q2 components, but for P2, Q1 components it does. Both the location and the temperature of the event horizon change with time. The thermal radiation spectrum of Dirac particles is the same as that of Klein-Gordon particles. 相似文献
19.
The Hawking radiation of Dirac particles in an arbitrarily rectilinearly accelerating Kinnersley black hole with electromagnetic charge and cosmological constant is investigated by using the generalized tortoise coordinate transformation. Both the location and the temperature of the event horizon depend on the time and the polar angle. The Hawking thermal radiation spectrum of Dirac particles is also derived. 相似文献
20.
A new method of researching fermion tunneling from the Vaidya——Bonner de Sitter black hole
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Using the general tortoise coordinate transformation, we research
the fermion tunneling of the Vaidya--Bonner de Sitter black hole via
a semi-classical method and finally obtain the right surface gravity, Hawking
temperature and tunneling rate near the event horizon and cosmical
horizon. 相似文献