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arXiv 1403.7352gr-qchep-th
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由引力action表面项得到孤立视界的熵

Entropy of isolated horizon from surface term of gravitational action

Cheng-Yong Zhang, Yu Tian, Xiao-Ning Wu, Shao-Jun Zhang

摘要:

从引力作用量的表面项出发,构造了一个中心扩张的维拉索罗代数,并利用Cardy公式导出了视界熵。这种方法为视界熵的计算和解释提供了一种新的途径。在本文中,我们将这种方法推广到一个更一般的情况下,孤立的地平线,其中包含非平稳时空超越平稳的。通过在视界附近施加适当的边界条件,将全同构集限制为一个子集,其中相应的Noether荷构成一个具有中心扩张的维拉索罗代数.然后利用Cardy公式,我们可以导出孤立视界的熵。

英文摘要:

Starting from the surface term of gravitational action, one can construct a Virasoro algebra with central extension, with which the horizon entropy can be derived by using Cardy formula. This approach gives a new routine to calculate and interpret the horizon entropy. In this paper, we generalize this approach to a more general case, the isolated horizon, which contains non-stationary spacetimes beyond stationary ones. By imposing appropriate boundary conditions near the horizon, the full set of diffeomorphism is restricted to a subset where the corresponding Noether charges form a Virasoro algebra with central extension. Then by using the Cardy formula, we can derive the entropy of the isolated horizon.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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