ADM approach to 2+1 dimensional gravity coupled to particles

Details ADM approach to 2+1 dimensional gravity coupled to particles ADM approach to 2+1 dimensional gravity coupled to particles

1999-07-14

arxiv.org/abs/hep-th/9907111v1

Annals Phys. 279 (2000) 282-310

Physics

High Energy Physics

High Energy Physics - Theory

34 pages, LaTex

Scientific paper

10.1006/aphy.1999.5972

We develop the canonical ADM approach to 2+1 dimensional gravity in presence of point particles. The instantaneous York gauge can be applied for open universes or universes with the topology of the sphere. The sequence of canonical ADM equations is solved in terms of the conformal factor. A simple derivation is given for the solution of the two body problem. A geometrical characterization is given for the apparent singularities occurring in the N-body problem and it is shown how the Garnier hamiltonian system arises in the ADM treatment by considering the time development of the conformal factor at the locations where the extrinsic curvature tensor vanishes.

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