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arXiv · 1510.05166

Self-Consistent Sources for Integrable Equations via Deformations of Binary Darboux Transformations

Oleksandr Chvartatskyi·Aristophanes Dimakis·Folkert Müller-Hoissen
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Abstract

We reveal the origin and structure of self-consistent source extensions of integrable equations from the perspective of binary Darboux transformations. They arise via a deformation of the potential that is central in this method. As examples, we obtain in particular matrix versions of self-consistent source extensions of the sine-Gordon, nonlinear Schrodinger, KdV, Boussinesq, KP, Davey-Stewartson, two-dimensional Toda lattice and discrete KP systems. We also recover a (2+1)-dimensional version of the Yajima-Oikawa system from a deformation of the pKP hierarchy. By construction, these systems are accompanied by a hetero binary Darboux transformation, which generates solutions of such a system from a solution of the source-free system and additionally solutions of an associated linear system and its adjoint. The essence of all this is encoded in universal equations in the framework of bidifferential calculus.

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Oleksandr Chvartatskyi, Aristophanes Dimakis, Folkert Müller-Hoissen. 2015-11-04. Self-Consistent Sources for Integrable Equations via Deformations of Binary Darboux Transformations. https://doi.org/10.1007/s11005-016-0859-1

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