Discrete Nonlinear Schrödinger Type Equations: Solutions and Continuum Limits
摘要
As local and nonlocal reductions of a discrete second-order Ablowitz-Kaup-Newell-Segur system, two discrete nonlinear Schrödinger type equations are considered. Through the bilinearization reduction method, we construct double Casoratian solutions of the reduced discrete nonlinear Schrödinger type equations, including soliton solutions and Jordan-block solutions. Dynamics of the obtained one-, two-soliton and the simplest Jordan-block solutions are analyzed and illustrated. Moreover, both semi-continuous limit and full-continuous limit, are applied to recover the local and nonlocal semi-discrete nonlinear Schrödinger type equations, as well as the local and nonlocal continuous nonlinear Schrödinger type equations. One-, two-soliton and the simplest Jordan-block solutions for the local and nonlocal semi-discrete nonlinear Schrödinger type equations are constructed and the corresponding dynamics are analyzed and illustrated.