Hamiltonian reduction of free particle motion on group SL(2, ${\Bbb R}$)

Details Hamiltonian reduction of free particle motion on group SL(2, ${\Bbb R}$) Hamiltonian reduction of free particle motion on group SL(2, ${\Bbb R}$)

1996-09-03

arxiv.org/abs/hep-th/9609030v1

Theor.Math.Phys.110:119-128,1997; Teor.Mat.Fiz.110:149-161,1997

Physics

High Energy Physics

High Energy Physics - Theory

12 pages, LaTeX file, to be publised in Teor. Mat. Fiz

Scientific paper

10.1007/BF02630375

The structure of the reduced phase space arising in the Hamiltonian reduction of the phase space corresponding to a free particle motion on the group ${\rm SL}(2, {\Bbb R})$ is investigated. The considered reduction is based on the constraints similar to those used in the Hamiltonian reduction of the Wess--Zumino--Novikov--Witten model to Toda systems. It is shown that the reduced phase space is diffeomorphic either to the union of two two--dimensional planes, or to the cylinder $S^1 \times {\Bbb R}$. Canonical coordinates are constructed for the both cases, and it is shown that in the first case the reduced phase space is symplectomorphic to the union of two cotangent bundles $T^*({\Bbb R})$ endowed with the canonical symplectic structure, while in the second case it is symplectomorphic to the cotangent bundle $T^*(S^1)$ also endowed with the canonical symplectic structure.

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