Thermodynamic Properties of Higher-Dimensional RN Black Holes

A general calculation formula of the heat capacity for the HRN black holes is derived. The heat capacities for Q, Φ＋ and γ- fixed are obtained. Assuming that the charge-mass ratio of fluctuation modes does not exceed the extremal value, the minimum charge-mass ratio of the black holes for which the heat capacity is positive is determined.     

Mechanical properties of the thermal equilibrium Friedmann–Robertson–Walker universe model

The mechanical property of the thermal-equilibrium Friedmann-Robertson-Walker （TEFRW） universe is first studied. The equation of state and the scale factor of the TEFRW universe take the forms ofw = w（a;zT） and a = a（a;zT,Ho）. For the universe consisting of the nonrelativistic matter and the dark energy, the behavior of the dark energy depends on the value of the present-day matter fraction. For the TEFRW universe consisting of N ingredients, the effective temperature is introduced. Lastly, a simple TEFRW universe model is analyzed.     

Kiselev黑洞的热力学性质和物质吸积特性

本文考虑带有黑洞视界和宇宙视界的Kiselev时空.研究以黑洞视界和宇宙视界为边界的系统的热力学性质.统一地给出了两个系统的热力学第一定律;在黑洞视界半径远小于宇宙视界半径的情况下,近似地计算了通过宇宙视界和黑洞视界的热能.然后,探讨Kiselev时空的物质吸积特性.在吸积能量密度正比于背景能量密度的条件下给出黑洞的吸积率,讨论了黑洞吸积率与暗能量态方程参数的关系.     

克尔-纽曼-反德西特黑洞的有效热力学性质

首先分析Reissner-Nordstrm-反de Sitter黑洞的有效左系统和右系统的热力学性质,然后分析更一般的克尔-纽曼-反德西特(KN-AdS)黑洞的情况,计算其相应的左系统和右系统的有效热力学量.在极限情况下,KN-AdS黑洞的有效热力学右系统满足能斯特定理,但有效左系统是一个有限温度系统. 关键词： 克尔-纽曼-反德西特黑洞 有效系统 极限情况 能斯特定理     

Energy and first law of thermodynamics for Born-Infeld-anti-de-Sitter black hole

We calculate the local energy and the energy density of the Reisner-Norstrm-anti-de-Sitter black hole, study the first law of thermodynamics and show the Smarr formula for the Born-Infeld-anti-de-Sitter black hole. Applying the first law of thermodynamics to the black hole region, we analyse the three energy exchange processes between the black hole region and the outer and the inner regions.     

Invariant expression for tunneling rate under canonical transformations

The original formula to calculate the tunneling rate through event horizons is apparently dependent on the type of coordinates used.In this paper,we propose an invariant expression under canonical transformations to study the tunneling effect.Moreover,the problem of factor 2 is solved naturally.As an application of this expression,we obtain the same tunneling rate both in the Schwarzschild and the Painleve′coordinates.It is shown that once the suitable formula to calculate tunneling rate is correctly identified,the tunneling method is manifestly covariant.     

Thermodynamic properties of Reissner–Nordström–de Sitter quintessence black holes

Mass, electric charge, and temperature of black holes in the Reissner-Nordström-de Sitter quintessence (RN-dSQ) spacetime are obtained. The heat capacities of the RN-dSQ black hole for certain electric charge and mass are analyzed. The electrostatic energy and the dark energy in the RN-dSQ black hole are also calculated.     

Quasi-Local Energy Distribution of the Modified Reissner--Nordström Black Hole

We discuss the energy distribution of the modified Reissner-Nordstrom black hole. It is suggested that the quasilocal energy distribution from Einstein energy-momentum complex should be appropriate. For the Reissner- NordstrOm spacetime, it can be seen that the energies of the outer and inner regions are exactly equivalent.     

椭圆旋转对称群

提出椭圆旋转对称群,它是一个单参数阿贝尔群.辅助参数η确定群轨道的形状,SO(2)旋转群对应η=1时的情况.     

Thermodynamic properties of Reissner-Nordstrm-de Sitter quintessence black holes

The mass,electric charge,and temperature of black holes in the Reissner-Nordstrm-de Sitter quintessence(RN-dSQ) spacetime are obtained.The heat capacities of the RN-dSQ black holes for certain electric charges and masses are analyzed.The electrostatic energy and dark energy in the RN-dSQ black holes are also calculated.