Methods and Applications of Analysis
Volume 29 (2022)
Special issue dedicated to Professor Ling Hsiao on the occasion of her 80th birthday, Part IV
Guest editors: Qiangchang Ju (Institute of Applied Physics and Computational Mathematics, Beijing), Hailiang Li (Capital Normal University, Beijing), Tao Luo (City University of Hong Kong), and Zhouping Xin (Chinese University of Hong Kong)
Long-time simulations of rogue wave solutions in the nonlinear Schrödinger equation
Pages: 149 – 160
Although several short-time simulations have been reported nicely reproducing rogue wave solutions in the nonlinear Schrödinger equation, rogue wave solutions are linearly unstable as shown by theoretical studies. In the present work, we perform long-time simulations for two kinds of rogue wave solutions, namely, the Akhmediev breather and Peregrine soliton. Numerical evidences demonstrate that spurious oscillations that emerge in the central domain in both simulations arise from round-off error and evolve under the mechanism of modulational instability. For the periodic approximation of the Peregrine soliton, the modulational instability also gives rise to additional oscillations on the boundary. We obtain a fitting formula to forecast the time when the boundary oscillations occur. Our simulation results show that a clean and faithful long-time reproduction of rogue wave solutions would be difficult because of the modulational instability.
nonlinear Schrödinger equation, modulational instability, numerical simulation, rogue wave
2010 Mathematics Subject Classification
This work is supported in part by the NSFC under grant numbers 11832001, 11988102, and 11890681.
Received 23 May 2020
Accepted 16 September 2020
Published 10 June 2022