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arXiv 2003.09994math.APmath-phmath.MP
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五次Gross-Pitaevskii方程黑色孤子的轨道稳定性

Orbital stability of the black soliton for the quintic Gross-Pitaevskii equation

Miguel A. Alejo, Adán J. Corcho

AI总结:

本文严格证明了一维五次Gross-Pitaevskii方程黑色孤子的轨道稳定性,并通过隐函数定理构造满足正交条件的扰动,同时证明了暗孤子在低速区间的轨道稳定性。

摘要:

本文对一维空间中五次Gross-Pitaevskii方程黑色孤子解的轨道稳定性给出了严格证明。我们首先构造并明确展示了黑色孤子和暗孤子解,并利用与黑色孤子和暗孤子扰动相关的正交性条件,证明了相应的Ginzburg-Landau能量在它们附近是强制的。满足所需正交性条件的黑色孤子和暗孤子周围合适扰动的存在性由隐函数定理推出。事实上,这些扰动涉及速度足够小的暗孤子以及由其空间导数显式表达式产生的比例因子。我们还通过估计调制参数随时间增长的方式,控制了沿五次Gross-Pitaevskii流的调制参数演化。作为直接结果,我们还证明了暗孤子在小区间速度范围内的轨道稳定性。

英文摘要:

In this work, a rigorous proof of the orbital stability of the black soliton solution of the quintic Gross-Pitaevskii equation in one spatial dimension is obtained. We first build and show explicitly black and dark soliton solutions and we prove that the corresponding Ginzburg-Landau energy is coercive around them by using some orthogonality conditions related to perturbations of the black and dark solitons. The existence of suitable perturbations around black and dark solitons satisfying the required orthogonality conditions is deduced from an Implicit Function Theorem. In fact, these perturbations involve dark solitons with sufficiently small speeds and some proportionality factors ari\-sing from the explicit expression of their spatial derivative. We are also able to control the evolution of the modulation parameters along the quintic Gross-Pitaevskii flow by estimating their growth in time. As a direct consequence, we also prove the orbital stability of the dark soliton in a small speed interval.

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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