江蘇省應用數學(中國礦業大學)中心系列學術報告
報告題目: Zero-wavenumber-gain MI, formation of rogue waves and time-localized solitons inmulticomponent systems with coherent coupling
報告時間:2023年11月22日10:00-11:00
報告人:劉磊重慶大學博士
騰訊會議:會議 ID:958-636-6498
摘要:It is known that rogue waves (RWs) are generated by the modulational instability (MI) of the baseband type. Starting with the Bers-Kaup-Reiman system for three-wave resonant interactions, we identify a specific RW-building mechanism based on MI which includes zero wavenumber in the gain band. An essential finding is that this mechanism works solely under a linear relation between the MI gain and a vanishingly small wavenumber of the modulational perturbation. We also report the emergence of a previously unexplored species of solitary waves,time-localized dark modes, which coincides with the condition for the occurrence of the zero-wavenumber-gain MI.
報告人簡介: 劉磊,重慶大學數學與統計學院講師,于2013年和2019年在南開大學和北京郵電大學分别獲得理學學士和博士學位。主要研究興趣包括孤子理論,非線性波的數值和解析計算,以及它們在非線性光纖等方面的應用。目前已獲得國家自然科學青年基金、理論物理專款博士後項目和中國博士後面上資助項目資助。以第一或通訊作者在Physical Review Letters,Physical Review A/E、Proceedings A,Chaos等國際期刊發表論文10多篇,被他引用100多次。