Abstract:
We construct analogues of the classical Heisenberg spin chain model (or the discrete Neumann system), on pseudo-spheres and light-like cones in the pseudo-Euclidean spaces and show their complete Hamiltonian integrability. Further, we prove that the Heisenberg model on a light-like cone leads to a new example of the integrable discrete contact system.
Keywords:
discrete Hamiltonian and contact systems, the Lax representation, complete integrability.
The research was supported by the Serbian
Ministry of Science Project 174020, Geometry and Topology of Manifolds, Classical Mechanics and
Integrable Dynamical Systems.