The wave equation on asymptotically de Sitter-like spaces

Details The wave equation on asymptotically de Sitter-like spaces The wave equation on asymptotically de Sitter-like spaces

2007-06-25

arxiv.org/abs/0706.3669v1

Mathematics

Analysis of PDEs

40 pages, 1 figure

Scientific paper

In this paper we obtain the asymptotic behavior of solutions of the Klein-Gordon equation on Lorentzian manifolds $(X^\circ,g)$ which are de Sitter-like at infinity. Such manifolds are Lorentzian analogues of the so-called Riemannian conformally compact (or asymptotically hyperbolic) spaces. Under global assumptions on the (null)bicharacteristic flow, namely that the boundary of the compactification X is a union of two disjoint manifolds, Y+ and Y-, and each bicharacteristic converges to one of these two manifolds as the parameter along the bicharacteristic goes to plus infinity, and to the other manifold as the parameter goes to minus infinity, we also define the scattering operator, and show that it is a Fourier integral operator associated to the bicharacteristic flow from Y+ to Y-.

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