Abstract
Darboux and Bäcklund transformations on integrable couplings are formulated and generalized. The generalization of the theory pertains to spectral problems where the spatial spectral matrix is a polynomial in \(\lambda \) of any order. A specific application to a generalized D-Kaup–Newell integrable couplings system is worked out, along with an explicit formula for the associated Bäcklund transformation. Solutions are given for the 0, 1, 2, 3-order generalized D-Kaup–Newell integrable coupling system. Formulas for the general m-th-order integrable couplings system are seen. Graphs of explicit solutions to the fourth-order integrable couplings are presented for chosen parameters showing solitons. A brief discussion about open problems and physical implications of the paper concludes the paper.
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Funding
This research was in part supported by NSFC under the Grants 11371326, 11301331, and 11371086, and NSF under the Grant DMS-1664561.
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McAnally, M., Ma, WX. Explicit solutions and Darboux transformations of a generalized D-Kaup–Newell hierarchy. Nonlinear Dyn 102, 2767–2782 (2020). https://doi.org/10.1007/s11071-020-06030-6
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DOI: https://doi.org/10.1007/s11071-020-06030-6