Entropy in the NUT-Kerr-Newman Black Holes in the Background of de Sitter Space-Time
GE Xian-Hui1,2, SHEN You-Gen1,2,3
1Shanghai Astronomical Observatory, Chinese Academy of Sciences, Shanghai 200030
2National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012
3Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing 100080
Entropy in the NUT-Kerr-Newman Black Holes in the Background of de Sitter Space-Time
GE Xian-Hui1,2;SHEN You-Gen1,2,3
1Shanghai Astronomical Observatory, Chinese Academy of Sciences, Shanghai 200030
2National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012
3Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing 100080
Abstract： We calculate the entropy of the fermion field in the NUT-Kerr-Newman black holes in the background of the de Sitter space-time by using the improved brick-wall method and the membrane model. Here the Euler characteristic of the black holes is over two. The results show that, as the cut-off is properly chosen, the entropy in the black hole satisfies the Bekenstein-Hawking area law.
GE Xian-Hui;SHEN You-Gen;. Entropy in the NUT-Kerr-Newman Black Holes in the Background of de Sitter Space-Time
[J]. 中国物理快报, 2002, 19(8): 1051-1053.
GE Xian-Hui, SHEN You-Gen,. Entropy in the NUT-Kerr-Newman Black Holes in the Background of de Sitter Space-Time
. Chin. Phys. Lett., 2002, 19(8): 1051-1053.
2002, Vol. 19 
