Topological Structure of Entropy of 4-Dimensional Axisymmetric Black Holes |
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Authors: | Xing Wang Shao-Feng Wu Shu Zhu Jin-Hua Yue Guo-Hong Yang |
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Institution: | (1) Department of Physics, Shanghai University, 200444 Shanghai, China |
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Abstract: | Using the relationship between the entropy and the Euler characteristic, an entropy density is introduced to describe the
inner topological structure of the entropy of 4-dimensional axisymmetric black holes. It is pointed out that the density of
entropy is determined by the singularities of the timelike Killing vector field of spacetime, and these singularities carry
the topological numbers, Hopf indices and Brouwer degrees, which are topological invariants. At last, Kerr–Newman black hole
as an example of axisymmetric black holes is given. What’s more, the entropy and the latent heat of the topological phase
transition of the black hole mentioned above are calculated and the latent heat just lies in the range of the energy of gamma
ray bursts.
This work is supported in part by the NSFs of China under Grant No. 10575068 and of Shanghai Municipal Committee of Science
and Technology under Grant No. 04ZR14059 and Shanghai Leading Academic Discipline Project under Project Number: T0104. |
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Keywords: | Euler characteristic Entropy Kerr– Newman black hole Killing vector field |
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