The Cardy-Verlinde formula and entropyof topological Kerr- Newman black holes in de Sitter spaces
Physics Department, Inst. for Studies in Theoretical Physics and Mathematics (IPM), P.O. Box 19395-5531, Tehran, Iran
2 Department of Science, Physics Group, Kordestan University, Sanandeg, Iran
3 Department of Physics, Sharif University of Technology, Tehran, Iran
4 Department of Physics, Yarmouk University, Irbid, Jordan
* e-mail: firstname.lastname@example.org
In this paper we show that the entropy of a cosmological horizon in 4-dimensional topological Kerr-Newman-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 number of dimensions. Furthermore, we find that the entropy of a black hole horizon can also be rewritten in terms of the Cardy-Verlinde formula for these black holes in de Sitter spaces, if we use the definition due to Abbott and Deser for conserved charges in asymptotically de Sitter spaces. Such results presume a well-defined dS/CFT correspondence, which has not yet attained the credibility of its AdS analogue.
© Springer-Verlag, 2003