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arXiv 2005.14266math.APcs.NAmath.NAmath.PR
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具有时空白噪声的一维聚焦随机$L^2$ -临界和超临界非线性薛定谔方程解的行为

Behavior of solutions to the 1D focusing stochastic $L^2$-critical and supercritical nonlinear Schrödinger equation with space-time white noise

Annie Millet, Svetlana Roudenko, Kai Yang

摘要:

本文研究了在时空白噪声驱动下,在$L^2$ -临界和超临界情形下的一维聚焦随机非线性薛定谔方程.与确定性的情况不同,哈密顿量(或能量)在随机环境中不守恒,质量(或$L^2$ -范数)在加性情况下也不守恒。因此,我们研究这些量的时间演化。然后研究了噪声对解的全局性态的影响。特别是,我们表明,噪声可能会导致爆破,从而停止的整体存在的解决方案,否则将是全球的确定性设置。此外,我们还研究了在乘性和加性噪声背景下噪声对爆破动力学的影响,得到了爆破解的轮廓和速率。我们的研究结果得出结论,爆破参数(速率和轮廓)是不敏感的类型或强度的噪声:如果爆破发生,它具有相同的动力学在确定性设置,但是,有一个(随机)移动的爆破中心,这可以被描述为一个随机变量正态分布。

英文摘要:

We study the focusing stochastic nonlinear Schrödinger equation in 1D in the $L^2$-critical and supercritical cases with an additive or multiplicative perturbation driven by space-time white noise. Unlike the deterministic case, the Hamiltonian (or energy) is not conserved in the stochastic setting, nor is the mass (or the $L^2$-norm) conserved in the additive case. Therefore, we investigate the time evolution of these quantities. After that we study the influence of noise on the global behavior of solutions. In particular, we show that the noise may induce blow-up, thus, ceasing the global existence of the solution, which otherwise would be global in the deterministic setting. Furthermore, we study the effect of the noise on the blow-up dynamics in both multiplicative and additive noise settings and obtain profiles and rates of the blow-up solutions. Our findings conclude that the blow-up parameters (rate and profile) are insensitive to the type or strength of the noise: if blow-up happens, it has the same dynamics as in the deterministic setting, however, there is a (random) shift of the blow-up center, which can be described as a random variable normally distributed.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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