物理
玻色-爱因斯坦凝聚体
动量(技术分析)
激发态
基态
联轴节(管道)
孤子
角动量
相(物质)
量子电动力学
非线性系统
量子力学
机械工程
财务
工程类
经济
作者
Shuai Cao,Chuan-Jia Shan,Dan-Wei Zhang,Xizhou Qin,Jun Xu
出处
期刊:Journal of The Optical Society of America B-optical Physics
[Optica Publishing Group]
日期:2015-01-07
卷期号:32 (2): 201-201
被引量:26
标识
DOI:10.1364/josab.32.000201
摘要
We numerically investigate the ground state, the Raman-driving dynamics and the nonlinear excitations of a realized spin-orbit-coupled Bose-Einstein condensate in a one-dimensional harmonic trap. Depending on the Raman coupling and the interatomic interactions, three ground-state phases are identified: stripe, plane wave and zero-momentum phases. A narrow parameter regime with coexistence of stripe and zero-momentum or plane wave phases in real space is found. Several sweep progresses across different phases by driving the Raman coupling linearly in time is simulated and the non-equilibrium dynamics of the system in these sweeps are studied. We find kinds of nonlinear excitations, with the particular dark solitons excited in the sweep from the stripe phase to the plane wave or zero-momentum phase within the trap. Moreover, the number and the stability of the dark solitons can be controlled in the driving, which provide a direct and easy way to generate dark solitons and study their dynamics and interaction properties.
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