Chern-Simons Quantization of (2+1)-Anti-De Sitter Gravity on a Torus

TL;DR

This paper explores the Chern-Simons formulation of 2+1 dimensional AdS gravity on a torus, analyzing its phase space structure and quantization, and establishing connections with the ADM formalism and modular invariance.

Contribution

It provides a detailed analysis of the phase space topology and quantization of 2+1 AdS gravity on a torus, including a corrected discussion on phase space topology and a modular invariant inner product.

Findings

Phase space is a product of non-Hausdorff manifolds and codimension sets.

Constructed a modified phase space as a cotangent bundle on a torus.

Established a relation between the quantum theory and spinor representation of ADM formalism.

Abstract

Chern-Simons formulation of 2+1 dimensional Einstein gravity with a negative cosmological constant is investigated when the spacetime has the topology $ R\times T^{2}$. The physical phase space is shown to be a direct product of two sub-phase spaces each of which is a non-Hausdorff manifold plus a set with nonzero codimensions. Spacetime geometrical interpretation of each point in the phase space is also given and we explain the 1 to 2 correspondence with the ADM formalism from the geometrical viewpoint. In quantizing this theory, we construct a "modified phase space" which is a cotangnt bundle on a torus. We also provide a modular invariant inner product and investigate the relation to the quantum theory which is directly related to the spinor representation of the ADM formalism. (This paper is the revised version of a previous paper(hep-th/9312151). The wrong discussion on the topology of the phase space is corrected.)