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arXiv 1611.08482math.AP
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实直线上立方半wave Equation的双孤子瞬态湍流区

A Two-Soliton with Transient Turbulent Regime for the Cubic Half-wave Equation on The Real Line

Patrick Gérard, Enno Lenzmann, Oana Pocovnicu, Pierre Raphaël

摘要:

考虑实直线$$i \partial_t u + |D| u = |u|^2 u, \ \ \widehat{|D|u}(ξ)=|ξ|\hat{u}(ξ), \ \ (t,x)\in \Bbb R_+\times \Bbb R.$$上的聚焦三次半波方程,构造了一个具有任意小$L^2$ -范数的时间上全局渐近紧双孤子解,它表现出以下两个区域:(i)瞬态湍流状态,其特征在于其$H^1$ -范数在有限时间间隔上的急剧和显式增长,接着是(ii)饱和状态,其中$H^1$ -范数在时间上永远保持稳定大。

英文摘要:

We consider the focusing cubic half-wave equation on the real line $$i \partial_t u + |D| u = |u|^2 u, \ \ \widehat{|D|u}(ξ)=|ξ|\hat{u}(ξ), \ \ (t,x)\in \Bbb R_+\times \Bbb R.$$ We construct an asymptotic global-in-time compact two-soliton solution with arbitrarily small $L^2$-norm which exhibits the following two regimes: (i) a transient turbulent regime characterized by a dramatic and explicit growth of its $H^1$-norm on a finite time interval, followed by (ii) a saturation regime in which the $H^1$-norm remains stationary large forever in time.

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