Nonlinear Sciences – Exactly Solvable and Integrable Systems
Scientific paper
2008-03-24
Gravity, Astrophysics, and Strings 05, eds. P. P. Fiziev and M. D. Todorov, St. Kliment Ohridski University Press, Sofia, 2006
Nonlinear Sciences
Exactly Solvable and Integrable Systems
Scientific paper
The multi-component nonlinear Schrodinger equation related to C.I=Sp(2p)/U(p) and D.III=SO(2p)/U(p)-type symmetric spaces with non-vanishing boundary conditions is solvable with the inverse scattering method (ISM). As Lax operator L we use the generalized Zakharov-Shabat operator. We show that the ISM for L is a nonlinear analog of the Fourier-transform method. As appropriate generalizations of the usual Fourier-exponential functions we use the so-called squared solutions, which are constructed in terms of the fundamental analytic solutions (FAS) of L and the Cartan-Weyl basis of the Lie algebra, relevant to the symmetric space. We derive the completeness relation for the squared solutions which turns out to provide spectral decomposition of the recursion (generating) operators, a natural generalizations of id/dx in the case of nonlinear evolution equations.
Atanasov Victor
Gerdjikov Vladimir
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