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Paper IPM / P / 7359  


Abstract:  
In this paper we show that the entropy of a cosmological horizon in topological ReissnerNordström de Sitter and KerrNewmande Sitter spaces can be described by the CardyVerlinde formula, which is supposed to be an entropy formula of conformal field theory in any number of dimension. Furthermore, we find that the entropy of a black hole horizon can also be rewritten in terms of the CardyVerlinde 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 result presume a welldefined dS/CFT correspondence, which has not yet attained the credibility of its AdS analogue.
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