Dynamics of Vector Bright Solitons in Spin-Tensor-Momentum-Coupled Bose–Einstein Condensates with Tunable Raman Coupling

IF 1.1 3区 物理与天体物理 Q4 PHYSICS, APPLIED
Ya-Jun Wang, Yan-Li Guo, Xue-Ying Yang, Xiao-Fei Zhang
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引用次数: 0

Abstract

We consider the stabilities and dynamical properties of solitons in one-dimensional spin-tensor-momentum-coupled Bose–Einstein condensates with periodical tunable Raman coupling by numerical simulating and variational approximating the time-dependent Gross–Pitaevskii equations. Our results show for a trapless system, the dynamically stabilized bright solitons can be formed by modulating Raman coupling with the initial state of polar soliton, and its evolution and movement show consistence with analytical prediction. The effects of oscillating frequency of Raman coupling are also investigated. In addition, the evolution of amplitudes of such solitons exhibits nontrivial mode with combination of two oscillations, which is different with the case of fixed Raman coupling. The periodically-modulating Raman coupling provides a new mechanism to stabilize the solitons in spin-tensor-momentum-coupled Bose–Einstein condensates, which would be beneficial for the potential study of soliton dynamics in experiment.

Abstract Image

具有可调谐拉曼耦合的自旋张量-量子耦合玻色-爱因斯坦凝聚态中的矢量明亮孤子动力学
我们通过数值模拟和变分近似随时间变化的格罗斯-皮塔耶夫斯基方程,考虑了具有周期性可调拉曼耦合的一维自旋张量-动量耦合玻色-爱因斯坦凝聚体中孤子的稳定性和动力学特性。结果表明,对于无轨系统,通过调制极性孤子初始状态的拉曼耦合可以形成动态稳定的亮孤子,其演化和运动与分析预测一致。同时还研究了拉曼耦合振荡频率的影响。此外,这种孤子的振幅演化在两种振荡的组合下呈现出非对称模式,这与固定拉曼耦合的情况不同。周期调制拉曼耦合为稳定自旋张量-动量耦合玻色-爱因斯坦凝聚态中的孤子提供了一种新的机制,这将有利于在实验中对孤子动力学进行潜在的研究。
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来源期刊
Journal of Low Temperature Physics
Journal of Low Temperature Physics 物理-物理:凝聚态物理
CiteScore
3.30
自引率
25.00%
发文量
245
审稿时长
1 months
期刊介绍: The Journal of Low Temperature Physics publishes original papers and review articles on all areas of low temperature physics and cryogenics, including theoretical and experimental contributions. Subject areas include: Quantum solids, liquids and gases; Superfluidity; Superconductivity; Condensed matter physics; Experimental techniques; The Journal encourages the submission of Rapid Communications and Special Issues.
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