The causal order on the ambient boundary

Abstract

We analyse the causal structure of the ambient boundary, the conformal infinity of the ambient (Poincaré) metric. Using topological tools we show that the only causal relation compatible with the global topology of the boundary spacetime is the horismos order. This has important consequences for the notion of time in the conformal geometry of the ambient boundary.

arXiv comment7 pages

References in corpus (3)

• Production of $\Sigma (1385{)}^{\pm }$ and $\Xi (1530{)}^0$ in proton-proton collisions at $\sqrt{s}=$ 7 TeV
• On the Orderability Problem and the Interval Topology
• Topology of the ambient boundary and the convergence of causal curves

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