Abstract
In this paper, we construct the discrete higher-order rogue wave (RW) solutions for a generalized integrable discrete nonlinear Schrödinger (NLS) equation. First, based on the modified Lax pair, the discrete version of generalized Darboux transformation is constructed. Second, the dynamical behaviors of first-, second- and third-order RW solutions are investigated in corresponding to the unique spectral parameter, higher-order term coefficient, and free constants. The differences between the RW solution of the higher-order discrete NLS equation and that of the Ablowitz–Ladik (AL) equation are illustrated in figures. Moreover, we explore the numerical experiments, which demonstrates that strong-interaction RWs are stabler than the weak-interaction RWs. Finally, the modulation instability of continuous waves is studied.
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This work of has been supported by the National Natural Science Foundations of China (Grant Numbers 12001361 and 11701510).
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Yang, J., Zhang, YL. & Ma, LY. Multi-rogue wave solutions for a generalized integrable discrete nonlinear Schrödinger equation with higher-order excitations. Nonlinear Dyn 105, 629–641 (2021). https://doi.org/10.1007/s11071-021-06578-x
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DOI: https://doi.org/10.1007/s11071-021-06578-x