De Sitter背景时空中NUT-Kerr-Newman黑洞的玻色子熵

Boson Entropy in the NUT-Kerr-Newman Black Holes in the Background of de Sitter Space-time

众所周知,一般黑洞的欧拉示性数都为2(或者为0),而NUT-Kerr-Newman黑洞是个例外,其欧拉示性数大于2。因此计算NUT-Kerr-Newman黑洞的玻色子熵有特殊的意义。运用在brick-wall方法的基础上发展起来的膜模型计算了NUT-Kerr-Newman黑洞在de Sitter时空背景下的玻色子熵。结果表明,在选取适当的截断因子的情况下,该黑洞的熵仍满足Bekenstein-Hawking面积定律。

It is well known that the Euler characteristics of most black holes is 2(or 0), only NUT-Kerr-Newman black hole whose Euler characteristics is over 2.Therefore, it is significant to calculate the entropy in the NUT-Kerr-Newman black holes. The entropy of boson field in the NUT-Kerr-Newman black holes in the background of the de Sitter space-time is calculated by using the improved brick-wall method-membrane model. The results evinced that as the cut-off is properly chosen, the entropy in the black hole satisfies Bekenstein-Hawking area law.