具有自旋轨道耦合的自旋-1 玻色-爱因斯坦凝聚体中的矢量无赖波

IF 2.8 2区 物理与天体物理 Q2 PHYSICS, MULTIDISCIPLINARY
Jun-Tao He, Hui-Jun Li, Ji Lin and Boris A Malomed
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引用次数: 0

摘要

我们对具有拉曼诱导自旋轨道耦合(SOC)的自旋-1 玻色-爱因斯坦凝聚体中的三分量无赖波(RWs)进行了分析和数值研究。利用多尺度扰动方法,我们得到了有效质量为正和负的无赖波的近似解析解,这些有效质量由系统的有效色散决定。这些解包括具有平滑和条纹形状的 RW 以及高阶 RW。解析解表明,系统三个组成部分中的 RW 表现出不同的速度,其最大峰值出现在相同的时空位置,这是 SOC 和相互作用造成的。通过与基础系统的直接数值模拟进行比较,我们证实了近似解析解的准确性。此外,我们还系统地探索了由基带调制不稳定性(BMI)决定的 RW 存在域。数值模拟证实,在 BMI 作用下,具有随机初始扰动的平面波会激发 RW,正如近似解析解所预测的那样。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Vector rogue waves in spin-1 Bose–Einstein condensates with spin–orbit coupling
We analytically and numerically study three-component rogue waves (RWs) in spin-1 Bose–Einstein condensates with Raman-induced spin–orbit coupling (SOC). Using the multiscale perturbative method, we obtain approximate analytical solutions for RWs with positive and negative effective masses, determined by the effective dispersion of the system. The solutions include RWs with smooth and striped shapes, as well as higher-order RWs. The analytical solutions demonstrate that the RWs in the three components of the system exhibit different velocities and their maximum peaks appear at the same spatiotemporal position, which is caused by SOC and interactions. The accuracy of the approximate analytical solutions is corroborated by comparison with direct numerical simulations of the underlying system. Additionally, we systematically explore existence domains for the RWs determined by the baseband modulational instability (BMI). Numerical simulations corroborate that, under the action of BMI, plane waves with random initial perturbations excite RWs, as predicted by the approximate analytical solutions.
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来源期刊
New Journal of Physics
New Journal of Physics 物理-物理:综合
CiteScore
6.20
自引率
3.00%
发文量
504
审稿时长
3.1 months
期刊介绍: New Journal of Physics publishes across the whole of physics, encompassing pure, applied, theoretical and experimental research, as well as interdisciplinary topics where physics forms the central theme. All content is permanently free to read and the journal is funded by an article publication charge.
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