Support of dS/CFT correspondence from perturbations of three-dimensional spacetime

We discuss the relation between bulk de Sitter three-dimensional spacetime and the corresponding conformal field theory at the boundary, in the framework of the exact quasinormal mode spectrum. We show that the quasinormal mode spectrum corresponds exactly to the spectrum of thermal excitations of Conformal Field Theory at the past boundary I-, together with the spectrum of a Conformal Field Theory at the future boundary I+. (C) 2002 Elsevier Science B.V. All rights reserved.