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Defocusing Hirota equation with fully asymmetric non-zero boundary conditions: the inverse scattering transform

Rusuo YePeng-Fei HanYi Zhang
Jan 2024
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摘要原文
The paper aims to apply the inverse scattering transform to the defocusing Hirota equation with fully asymmetric non-zero boundary conditions (NZBCs), addressing scenarios in which the solution's limiting values at spatial infinities exhibit distinct non-zero moduli. In comparison to the symmetric case, we explore the characteristic branched nature of the relevant scattering problem explicitly, instead of introducing Riemann surfaces. For the direct problem, we formulate the Jost solutions and scattering data on a single sheet of the scattering variables. We then derive their analyticity behavior, symmetry properties, and the distribution of discrete spectrum. Additionally, we study the behavior of the eigenfunctions and scattering data at the branch points. Finally, the solutions to the defocusing Hirota equation with asymmetric NZBCs are presented through the related Riemann-Hilbert problem on an open contour. Our results can be applicable to the study of asymmetric conditions in nonlinear optics.
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