Dynamical instability of 3D stationary and traveling planar dark solitons

Dynamical instability of 3D stationary and traveling planar dark solitons
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3D 静止和行进平面暗孤子的动态不稳定性

DOI:
10.1088/1361-648x/ac9e36
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发表时间:
2022
期刊:
Journal of Physics: Condensed Matter
影响因子:
--
通讯作者:
Kevrekidis, P. G.
Kevrekidis, P. G.
中科院分区:
--
文献类型:
--
作者:
Mithun, T.;Fritsch, A. R.;Spielman, I. B.;Kevrekidis, P. G.

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在这里,我们通过定量比较理论分析和相关的数值计算与我们的实验结果,重新审视了自斥三维(3D)玻色-爱因斯坦凝聚体中平稳和传播的孤子激发的主题。在众多实验的推动下,包括我们自己的研究,我们使用全三维数值模拟来探索平面暗孤子的存在、稳定性和演化动力学。这也使我们能够研究它们的不稳定引起的衰变产物,包括孤子涡和涡环。在没有可调参数的情况下,我们的数值结果与实验观察到的相干结构一致。在没有纵向陷阱的情况下,我们确定了数值上精确的行进解,并量化了它们的横向不稳定阈值如何作为孤立波速度的函数变化。
Here we revisit the topic of stationary and propagating solitonic excitations in self-repulsive three-dimensional (3D) Bose–Einstein condensates by quantitatively comparing theoretical analysis and associated numerical computations with our experimental results. Motivated by numerous experimental efforts, including our own herein, we use fully 3D numerical simulations to explore the existence, stability, and evolution dynamics of planar dark solitons. This also allows us to examine their instability-induced decay products including solitonic vortices and vortex rings. In the trapped case and with no adjustable parameters, our numerical findings are in correspondence with experimentally observed coherent structures. Without a longitudinal trap, we identify numerically exact traveling solutions and quantify how their transverse destabilization threshold changes as a function of the solitary wave speed.
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