Causal properties of AdS-isometry groups I: Causal actions and limit sets

Details Causal properties of AdS-isometry groups I: Causal actions and limit sets Causal properties of AdS-isometry groups I: Causal actions and limit sets

2005-09-23

arxiv.org/abs/math/0509552v2

Adv. Theor. Math. Phys. 12, 1 (2008) 1--66

Mathematics

Geometric Topology

Scientific paper

We study the causality relation in the 3-dimensional anti-de Sitter space AdS and its conformal boundary Ein. To any closed achronal subset $\Lambda$ in ${Ein}\_2$ we associate the invisible domain $E(\Lambda)$ from $\Lambda$ in AdS. We show that if $\Gamma$ is a torsion-free discrete group of isometries of AdS preserving $\Lambda$ and is non-elementary (for example, not abelian) then the action of $\Gamma$ on $E(\Lambda)$ is free, properly discontinuous and strongly causal. If $\Lambda$ is a topological circle then the quotient space $M\_\Lambda(\Gamma) = \Gamma\backslash{E}(\Lambda)$ is a maximal globally hyperbolic AdS-spacetime admitting a Cauchy surface $S$ such that the induced metric on $S$ is complete. In a forthcoming paper we study the case where $\Gamma$ is elementary and use the results of the present paper to define a large family of AdS-spacetimes including all the previously known examples of BTZ multi-black holes.

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