A Bi-Hamiltonian Structure for the Integrable, Discrete Non-Linear Schrodinger System

Abstract

This paper shows that the Ablowitz-Ladik hierarchy of equations (a well-known integrable discretization of the Non-linear Schrodinger system) can be explicitly viewed as a hierarchy of commuting flows which: (a) are Hamiltonian with respect to both a standard, local Poisson operator J and a new non-local, skew, almost Poisson operator K, on the appropriate space; (b) can be recursively generated from a recursion operator R (obtained by composing K and the inverse of J.) In addition, the proof of these facts relies upon two new pivotal resolvent identities which suggest a general method for uncovering bi-Hamiltonian structures for other families of discrete, integrable equations.

33 pages

References in corpus (2)

• On the local systems Hamiltonian in the weakly nonlocal Poisson brackets
• Integrable dynamics of a discrete curve and the Ablowitz-Ladik hierarchy

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• Solutions of matrix NLS systems and their discretisations: A unified treatment
• Tri-Hamiltonian Structure of the Ablowitz-Ladik Hierarchy
• A centerless representation of the Virasoro algebra associated with the unitary circular ensemble
• The Ablowitz-Ladik Hierarchy Revisited