Elliptic Sklyanin integrable systems for arbitrary reductive groups

Details Elliptic Sklyanin integrable systems for arbitrary reductive groups Elliptic Sklyanin integrable systems for arbitrary reductive groups

2002-03-04

arxiv.org/abs/math/0203031v4

Adv. Theor. Math. Phys. 6 (2002) 873-978

Mathematics

Algebraic Geometry

Minor changes, 89 pages, Latex

Scientific paper

We present the analogue, for an arbitrary complex reductive group G, of the elliptic integrable systems of Sklyanin. The Sklyanin integrable systems were originally constructed on symplectic leaves, of a quadratic Poisson structure, on a loop group of type A. The phase space, of our integrable systems, is a group-like analogue of the Hitchin system over an elliptic curve E. We consider the moduli space of pairs (P,f), where P is a principal G-bundle on E, and f is a meromorphic section of the adjoint group bundle. We show: 1) The moduli space admits an algebraic Poisson structure. It is related to the poisson structures on loop groupoids, constructed by Etingof and Varchenko, using Felder's elliptic solutions of the Classical Dynamical Yang-Baxter Equation. 2) The symplectic leaves are finite dimensional. A symplectic leaf is determined by labeling, finitely many points of E, each by a dominant co-character of the maximal torus of G. 3) Each leaf is an algebraically completely integrable system.

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