旋量玻色-爱因斯坦凝聚体通过障碍物的流动
Spinor Bose-Einstein condensate flow past an obstacle
摘要：
本文研究了旋量（F=1）玻色-爱因斯坦凝聚体在障碍物存在下的流动。我们认为铁磁和极性自旋相关的相互作用的情况下，发现该系统演示了两个声音的速度，确定分析。数值模拟揭示了宏观非线性结构的成核，例如暗孤子和涡旋-反涡旋对，以及分别在一维和高维设置中的涡旋环，当局部缺陷（例如，蓝失谐激光束）以大于第二临界速度的速度被拖曳通过旋量凝聚体。
英文摘要：
We study the flow of a spinor (F=1) Bose-Einstein condensate in the presence of an obstacle. We consider the cases of ferromagnetic and polar spin-dependent interactions and find that the system demonstrates two speeds of sound that are identified analytically. Numerical simulations reveal the nucleation of macroscopic nonlinear structures, such as dark solitons and vortex-antivortex pairs, as well as vortex rings in one- and higher-dimensional settings respectively, when a localized defect (e.g., a blue-detuned laser beam) is dragged through the spinor condensate at a speed larger than the second critical speed.
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