Global structure of Witten's 2+1 gravity on ${\bf R}\times T^2$

Details Global structure of Witten's 2+1 gravity on ${\bf R}\times T^2$ Global structure of Witten's 2+1 gravity on ${\bf R}\times T^2$

1994-03-21

arxiv.org/abs/gr-qc/9403041v1

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

3 pages, LaTeX. CGPG-94/3-2, WISC-MILW-94-TH-12

Scientific paper

We investigate the space ${\cal M}$ of classical solutions to Witten's formulation of 2+1 gravity on the manifold ${\bf R} \times T^2$. ${\cal M}$ is connected, but neither Hausdorff nor a manifold. However, removing from ${\cal M}$ a set of measure zero yields a connected manifold which is naturally viewed as the cotangent bundle over a non-Hausdorff base space. Avenues towards quantizing the theory are discussed in view of the relation between spacetime metrics and the various parts of~${\cal M}$. (Contribution to the proceedings of the Lanczos Centenary Conference, Raleigh, NC, December 12--17, 1993.)

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