Classical R-Matrices and the Feigin-Odesskii Algebra via Hamiltonian and Poisson Reductions

Details Classical R-Matrices and the Feigin-Odesskii Algebra via Hamiltonian and Poisson Reductions Classical R-Matrices and the Feigin-Odesskii Algebra via Hamiltonian and Poisson Reductions

2003-01-17

arxiv.org/abs/hep-th/0301121v1

J.Phys.A36:6979-7000,2003

Physics

High Energy Physics

High Energy Physics - Theory

27 pages LaTex

Scientific paper

10.1088/0305-4470/36/25/306

We present a formula for a classical $r$-matrix of an integrable system obtained by Hamiltonian reduction of some free field theories using pure gauge symmetries. The framework of the reduction is restricted only by the assumption that the respective gauge transformations are Lie group ones. Our formula is in terms of Dirac brackets, and some new observations on these brackets are made. We apply our method to derive a classical $r$-matrix for the elliptic Calogero-Moser system with spin starting from the Higgs bundle over an elliptic curve with marked points. In the paper we also derive a classical Feigin-Odesskii algebra by a Poisson reduction of some modification of the Higgs bundle over an elliptic curve. This allows us to include integrable lattice models in a Hitchin type construction.

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