Collisions of particles in locally AdS spacetimes

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dc.creatorBarbot, Thierry
dc.creatorBonsante, Francesco
dc.creatorSchlenker, Jean-Marc
dc.date2009-05-12
dc.date.accessioned2026-07-07T13:14:04Z
dc.date.available2026-07-07T13:14:04Z
dc.descriptionWe investigate 3-dimensional globally hyperbolic AdS manifolds containing "particles", i.e., cone singularities along a graph $Γ$. We impose physically relevant conditions on the cone singularities, e.g. positivity of mass (angle less than $2π$ on time-like singular segments). We construct examples of such manifolds, describe the cone singularities that can arise and the way they can interact (the local geometry near the vertices of $Γ$). The local geometry near an "interaction point" (a vertex of the singular locus) has a simple geometric description in terms of polyhedra in the extension of hyperbolic 3-space by the de Sitter space. We then concentrate on spaces containing only (interacting) massive particles. To each such space we associate a graph and a finite family of pairs of hyperbolic surfaces with cone singularities. We show that this data is sufficient to recover the space locally (i.e., in the neighborhood of a fixed metric). This is a partial extension of a result of Mess for non-singular globally hyperbolic AdS manifolds.
dc.description46 pages, several figures
dc.identifierhttps://arxiv.org/abs/0905.1823
dc.identifierhttp://arxiv.org/abs/0905.1823
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/230096
dc.subjectDifferential Geometry
dc.subjectMathematical Physics
dc.subjectGeometric Topology
dc.titleCollisions of particles in locally AdS spacetimes
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