Nonautonomous Solitons for the Coupled Variable-Coefficient Cubic-Quintic Nonlinear Schrodinger Equations with External Potentials in the Non-Kerr Fibre

作者：Mao, Bing-Qing; Gao, Yi-Tian^*; Feng, Yu-Jie; Yu, Xin

来源：Zeitschrift fur Naturforschung Section A-A Journal of Physical Sciences, 2015, 70(12): 985-994.

DOI：10.1515/zna-2015-0319

• Coupled Variable-Coefficient Cubic-Quintic Nonlinear Schrodinger Equations with External Potentials
• Nonautonomous Soliton
• Non-Kerr Fibre
• Similarity Transformation
• Symbolic Computation

Variable-coefficient nonlinear Schrodinger (NLS)-type models are used to describe certain phenomena in plasma physics, nonlinear optics, arterial mechanics, and Bose-Einstein condensation. In this article, the coupled variable-coefficient cubic-quintic NLS equations with external potentials in the non-Kerr fibre are investigated. Via symbolic computation, similarity transformations and relevant constraints on the coefficient functions are obtained. Based on those transformations, such equations are transformed into the coupled cubic-quintic NLS equations with constant coefficients. Nonautonomous soliton solutions are derived, and propagation and interaction of the nonautonomous solitons in the non-Kerr fibre are investigated analytically and graphically. Those soliton solutions are related to the group velocity dispersion r(x) and external potentials h(1)(x) and h(2)(x, t). With the different choices of r(x), parabolic, cubic, and periodically oscillating solitons are obtained; with the different choices of h(2)(x, t), we can see the dromion-like structures and nonautonomous solitons with smooth step-like oscillator frequency profiles, to name a few.

• 出版日期2015-12
• 单位北京航空航天大学