Poisson structure and symmetry in the Chern-Simons formulation of (2+1)-dimensional gravity

Catherine Meusburger, Bernd Johannes Schroers

Research output: Contribution to journalArticle

51 Citations (Scopus)

Abstract

In the formulation of (2 + 1)-dimensional gravity as a Chem-Simons gauge theory, the phase space is the moduli space of flat Poincare group connections. Using the combinatorial approach developed by Fock and Rosly, we give an explicit description of the phase space and its Poisson structure for the general case of a genus g oriented surface with punctures representing particles and a boundary playing the role of spatial infinity. We give a physical interpretation and explain how the degrees of freedom associated with each handle and each particle can be decoupled. The symmetry group of the theory combines an action of the mapping class group with asymptotic Poincare transformations in a nontrivial fashion. We derive the conserved quantities associated with the latter and show that the mapping class group of the surface acts on the phase space via Poisson isomorphisms.

Original languageEnglish
Article numberPII S0264-9381(03)58965-1
Pages (from-to)2193-2233
Number of pages41
JournalClassical and Quantum Gravity
Volume20
Issue number11
DOIs
Publication statusPublished - 7 Jun 2003

Keywords

  • 2+1 DIMENSIONAL GRAVITY
  • QUANTUM-GRAVITY
  • COMBINATORIAL QUANTIZATION
  • GENERAL-RELATIVITY
  • SPACE
  • OBSERVABLES
  • SCATTERING
  • PARTICLE
  • SURFACE

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