The Atiyah-Hitchin bracket for the cubic nonlinear Schrodinger equation. ii. Periodic potentials

Details The Atiyah-Hitchin bracket for the cubic nonlinear Schrodinger equation. ii. Periodic potentials The Atiyah-Hitchin bracket for the cubic nonlinear Schrodinger equation. ii. Periodic potentials

2004-03-16

arxiv.org/abs/math-ph/0403031v2

IMRP Int. Math. Res. Pap. 2006, 17683, 1-60

Physics

Mathematical Physics

38 pages, 6 figures

Scientific paper

This is the second in a series of papers on Poisson formalism for the cubic nonlinear Schr\"{o}dinger equation with repulsive nonlinearity. In this paper we consider periodic potentials. The inverse spectral problem for the periodic auxiliary Dirac operator leads to a hyperelliptic Riemann surface $\G$. Using the spectral problem we introduce on this Riemann surface a meromorphic function $\P$. We call it the Weyl function, since it is closely related to the classical Weyl function discussed in the first paper. We show that the pair $(\G,\P)$ carries a natural Poisson structure. We call it the deformed Atiyah--Hitchin bracket. The Poisson bracket on the phase space is the image of the deformed Atiyah--Hitchin bracket under the inverse spectral transform.

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