2018/07/19 by Mark J. Ablowitz, Bao‐Feng Feng, Xu‐Dan Luo +1 · 110 citations
Mathematics · Physics and Astronomy · #Algebraic structures and combinatorial models #Boundary value problem #Eigenfunction #Eigenvalues and eigenvectors #Geometry #Integrable system #Inverse problem #Inverse scattering problem #Inverse scattering transform #Mathematical analysis #Mathematical physics #Mathematics #Nonlinear Photonic Systems #Nonlinear Waves and Solitons #Nonlinear system #Physics #Quantum mechanics #Scattering #Sine #Soliton #sine-Gordon equation
paper · pdf · doi:10.1111/sapm.12222
published in Studies in Applied Mathematics 141(3), 267-307 (Wiley)
openalex publication_date 2018/07/19 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Abstract Nonlocal reverse space‐time Sine/Sinh‐Gordon type equations were recently introduced. They arise from a remarkably simple nonlocal reduction of the well‐known AKNS scattering problem, hence, they constitute an integrable evolution equations. Furthermore, the inverse scattering transform (IST) for rapidly decaying data was also constructed. In this paper, the IST for these novel nonlocal equations corresponding to nonzero boundary conditions (NZBCs) at infinity is presented. The NZBC problem is more complex due to the intricate branching structure of the associated linear eigenfunctions. Two cases are analyzed, which correspond to two different values of the phase at infinity. Special soliton solutions are discussed and explicit 1‐soliton and 2‐soliton solutions are found. Both spatially independent and spatially dependent boundary conditions are considered.