Cai, RG , Chinese Acad Sci, Inst Theoret Phys, POB 2735, Beijing 10008, Peoples R China.
部门归属:
Chinese Acad Sci, Inst Theoret Phys, Beijing 10008, Peoples R China
英文摘要:
In this Letter we discuss the question of whether the entropy of cosmological horizon in some asymptotically de Sitter spaces can be described by the Cardy-Verlinde formula, which is supposed to be an entropy formula of conformal field theory in any dimension. For the Schwarzschild-de Sitter solution, although the gravitational mass is always negative (in the sense of the prescription in hep-th/0110108 to calculate the conserved charges of asymptotically de Sitter spaces), we find that indeed the entropy of cosmological horizon can be given by using naively the Cardy-Verlinde formula. The entropy of pure de Sitter spaces can also be expressed by the Cardy-Verlinde formula. For the topological de Sitter solutions, which have a cosmological horizon and a naked singularity, the Cardy-Verlinde formula also works well. Our result is in favour of the dS/CFT correspondence. (C) 2002 Elsevier Science B.V. All rights reserved.
