[Zhang, Cheng-Yong
; Zhang, Shao-Jun] Shanghai Jiao Tong Univ, Dept Phys & Astron, Shanghai 200240, Peoples R China
; [Tian, Yu] Univ Chinese Acad Sci, Sch Phys, Beijing 100049, Peoples R China
; [Wu, Xiao-Ning] Chinese Acad Sci, Acad Math & Syst Sci, Inst Math, Beijing 100190, Peoples R China
; [Tian, Yu
; Wu, Xiao-Ning] Chinese Acad Sci, Inst Theoret Phys, State Key Lab Theoret Phys, Beijing 100190, Peoples R China
; [Wu, Xiao-Ning] Chinese Acad Sci, Hua Loo Keng Key Lab Math, Beijing 100190, Peoples R China
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 using the Cardy formula. This approach provides a new routine for calculating and interpreting 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 diffeomorphisms 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.
Zhang, CY,Tian, Y,Wu, XN,et al. Entropy of the isolated horizon from the surface term of gravitational action[J]. CLASSICAL AND QUANTUM GRAVITY,2014,31(19):195002.
