摘要
从Reissner Nordstrom deSitter时空背景下的Klein Gordon方程出发 ,利用brick wall方法计算了黑洞的自由能和熵 .结果表明 ,这种黑洞的熵为它的外视界和宇宙视界面积之和的 1/4 ,与人们预期的结果相符 .由此可见 ,渐近deSitter时空中的黑洞熵除了黑洞视界面的贡献之外 ,还应包括宇宙视界面的贡献 .这从一定程度上揭示了黑洞熵与视界面积之间的内在联系 ,也更进一步地揭示了brick wall模型的本质 .
Thinking of Klein Gordon equation in Reissner Nordstrom de Sitter spacetime, the free energy and entropy of this kind of black hole are calculated via brick wall method. It is difficult to calculate the free energy because there are three horizons whose temperature is different from one another. Taking improved brick wall model, which means that the free energy and entropy are mainly from a thin layer close to the horizon, the problem is solved successfully and a good result is obtained. It is found that the entropy of this system is 1/4 of the sum of the areas of the external and cosmic event horizons. This is coincident with the result expected. The entropy of this system not only includes the contribution of the black hole horizon, but also includes the contribution of the cosmological horizon. It is found that there is an internal relation between the event horizon and the entropy. More about what is the brick wall model is understood.
出处
《北京师范大学学报（自然科学版）》
CAS
CSCD
北大核心
2000年第5期626-630,共5页
Journal of Beijing Normal University(Natural Science)
基金
国家自然科学基金资助项目!(197730 0 3)
教育部博士点基金资助项目!(96 0 0 2 70 1)
关键词
黑洞熵
R-N黑洞
非热平衡
天体物理
de Sitter spacetime
Reissner Nordstrom black hole
entropy of black hole
brick wall method
horizon
