Long range integrable oscillator chains from quantum algebras

Completely integrable Hamiltonians defining classical mechanical systems of N coupled oscillators are obtained from Poisson realizations of Heisenberg–Weyl, harmonic oscillator and sl(2, IR) coalgebras. Various completely integrable deformations of such systems are constructed by considering quantum deformations of these algebras. Explicit expressions for all the deformed Hamiltonians and constants of motion are given, and the long-range nature of the interactions is shown to be linked to the underlying coalgebra structure. The relationship between oscillator systems induced from the sl(2, IR) coalgebra and angular momentum chains is presented, and a nonstandard integrable deformation of the hyperbolic Gaudin system is obtained.