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Peregrine Solitons Beyond the Threefold Limit and Their Two-Soliton Interactions
Shihua Chen1, Yanlin Ye1, Jose M Soto-Crespo2
1School of Physics, Southeast University, Nanjing 211189, China.
Abstract:
Within the coupled Fokas-Lenells equations framework, we show explicitly that, in contrast to the expected threefold-amplitude magnification, Peregrine solitons can reach a peak amplitude as high as 5 times the background level. Besides, the interaction of two such anomalous Peregrine solitons can generate a spikelike rogue wave of extremely high peak amplitude, depending on the parameters used. We numerically confirm that the Peregrine soliton beyond the threefold limit can be reproduced from either a deterministic initial profile or a chaotic background field, hence anticipating the feasibility of its experimental observation.
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