We study the dynamics of binary Bose–Einstein condensates made of ultracold and dilute alkali-metal atoms in a quasi-one-dimensional setting. Numerically solving the two coupled Gross–Pitaevskii equations which accurately describe the system dynamics, we demonstrate that the spin transport can be controlled by suitably quenching spin–orbit and Rabi coupling strengths. Moreover, we predict a variety of dynamical features induced by quenching: broken oscillations, breathers-like oscillating patterns, spin-mixing–demixing, miscible–immiscible transition, emerging dark–bright states, dark solitons, and spin-trapping dynamics. We also outline the experimental relevance of the present study in manipulating the spin states in 39 K condensates.

中文翻译：

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自旋轨道耦合玻色-爱因斯坦凝聚物中明亮孤子和其他局部状态的猝灭动力学

我们在准一维环境中研究了由超冷和稀碱金属原子构成的二元玻色-爱因斯坦凝聚物的动力学。通过数值求解两个精确描述系统动力学的耦合的Gross-Pitaevskii方程，我们证明可以通过适当地淬灭自旋轨道和Rabi耦合强度来控制自旋输运。此外，我们预测了淬灭引起的各种动力学特征：破碎的振动，类似呼吸的振荡模式，自旋混合-脱模，可混溶-不混溶的转变，出现的暗-亮状态，暗孤子和自旋陷阱动力学。我们还概述了本研究在控制39 K冷凝物中自旋态方面的实验意义。