Quantum Bäcklund Transformations: some ideas and examples

Details Quantum Bäcklund Transformations: some ideas and examples Quantum Bäcklund Transformations: some ideas and examples

2011-12-16

arxiv.org/abs/1112.3755v1

Nonlinear Sciences

Exactly Solvable and Integrable Systems

14 pages, contribution to Solitons in 1+1 and 2+1 dimensions. DS, KP and all that, conference in honor of the 70th birthday of

Scientific paper

In this work we give a mechanical (Hamiltonian) interpretation of the so called spectrality property introduced by Sklyanin and Kuznetsov in the context of B\"acklund transformations (BTs) for finite dimensional integrable systems. The property turns out to be deeply connected with the Hamilton-Jacobi separation of variables and can lead to the explicit integration of the underlying model through the expression of the BTs. Once such construction is given, it is shown, in a simple example, that it is possible to interpret the Baxter Q operator defining the quantum BTs us the Green's function, or propagator, of the time dependent Schr\"odinger equation for the interpolating Hamiltonian.

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