三階Lovelock引力中的黑洞
[Abstract]:In the flat (flat) and Anti-de Sitter spacetime, the third-order Lovelock static black hole solution is obtained and the mass, temperature and entropy of the black hole are calculated. By taking the special coefficients of Gauss-Bonnet and third-order Lovelock terms, we obtain the special solutions of black holes in two kinds of space-time. According to these two special solutions, the thermodynamic analysis of the black hole is carried out under the condition that the coefficients of the Gauss-Bonnet term are positive (偽 20) and negative (a 20), respectively. For the third-order Lovelock black hole with flat spacetime, the temperature and entropy of the black hole in 7-dimensional spacetime are modified based on the Hamilton-Jacobian method. For a positive hypersurface of constant curvature, that is, KG 1, there is an intermediate stable phase for a black hole with 偽 20 in seven, eight, and nine dimensional spacetime. In higher dimensional spacetime, there is no black hole solution. When a 20, the black hole exists inside and outside two event limits, extreme black hole or bare singularity when the coefficient is different. However, for negative hypersurfaces of constant curvature, that is, KG -1, there is no black hole solution in the case of 偽 20 and a 20. For the third-order Lovelock black hole in anti-de Sitte spacetime, there are three different event horizon structures K0, 鹵1. The black hole (a20) is thermodynamically stable in the whole region, and the black hole (a20) has an intermediate unstable phase. For the positive hypersurface of constant curvature, that is, the black hole (a20) of KG 1, 7 dimensional spacetime, there is an intermediate unstable phase, and in 8 dimensional spacetime, when 偽 2 is less than a certain value, the black hole has two thermodynamically unstable regions. This is similar to the region of thermodynamic stability of higher dimensional spacetime. For a _ 2O, there is an intermediate unstable phase in the spherical seven-dimensional black hole when the coefficient is small, but when the coefficient is large, the black hole is globally stable. In higher dimensional spacetime, black holes have an intermediate unstable phase. In addition, the thermodynamic properties and conserved quantities of black holes are independent of Lovelock coefficients and degenerate to the case of general relativity when k = 0. Because of the high nonlinearity of the Lovelock equation of gravitational motion, it is difficult to obtain the simple expression of the black hole rotational solution. By introducing a small angular momentum into a static system, we can study the slowly rotating Lovelock black hole and find that the t 蠁 component of the equation of motion involves functions g (r) and c (r). In addition, the non-diagonal component of the electromagnetic field Zhang Liang is related to the function c (r). The analytical solution of the charged Gauss-Bonnet slowly rotating black hole is obtained by considering the concrete expression of the action quantity, and the slow rotation solution of the uncharged and charged third-order Lovelock black hole is obtained by using this method. Then the angular momentum, magnetic dipole moment and magnetic cycle ratio of Gauss-Bonnet black hole and third-order Lovelock black hole are calculated respectively. It is found that these higher-order derivative curvature terms do not affect the magnetic cycle ratio of black hole. In addition, it is very difficult to solve the slow rotation solution by the equation of motion if we consider more related terms of the Lovelock action. However, the slow rotation of Gauss-Bonnet black hole in flat spacetime is obtained by direct variation. We find that the event horizon of the black hole and the infinite redshift surface no longer coincide when the rotation of the black hole is not very slow.
【學(xué)位授予單位】:西北大學(xué)
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2011
【分類號(hào)】:P145.8
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