The authors construct smooth vacuum initial data without trapped surfaces whose future evolution produces N causally independent trapped surfaces.
Formation of Trapped Surfaces in Geodesic Foliation
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abstract
We revisit the classical results of the formation of trapped surfaces for the Einstein vacuum equation relying on the geodesic foliation, rather than the double null foliation used in all previous results, starting with the seminal work of Christodoulou \cite{Chr1} and continued in \cite{KRodn}, \cite{An}, \cite{AnLuk}, \cite{KLR}, \cite{An1}. The main advantage of the method is that it only requires information on the incoming curvature along the incoming initial null hypersurface. The result is based on a version of the non-integrable PT frame introduced in \cite{KS:Kerr} and \cite{GKS}, associated to the geodesic foliation.
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Formation of multiple Black Holes from Cauchy data
The authors construct smooth vacuum initial data without trapped surfaces whose future evolution produces N causally independent trapped surfaces.