Dynamical vortex phases in a Bose-Einstein condensate driven by a rotating optical lattice.
Dynamical vortex phases in a Bose-Einstein condensate driven by a rotating optical lattice.
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DOI：
10.1103/physrevlett.97.240404
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发表时间：
2006-08
影响因子：
8.6
通讯作者：
K. Kasamatsu;M. Tsubota
中科院分区：
文献类型：
--
作者：
K. Kasamatsu;M. Tsubota
我们给出了存在旋转光学晶格时囚禁玻色-爱因斯坦凝聚体中涡旋动力学的模拟结果。改变凝聚态和光学晶格之间的势幅和相对旋转频率，我们发现了丰富多样的涡旋动力学相。这些不同阶段的开始由驱动力、钉扎力和涡旋相互作用的力平衡来描述。特别是，当光学晶格的旋转速度快于凝聚体时，非公度效应导致了驱动力和耗散之间的竞争所支撑的涡旋-液体相。
We present simulation results of the vortex dynamics in a trapped Bose-Einstein condensate in the presence of a rotating optical lattice. Changing the potential amplitude and the relative rotation frequency between the condensate and the optical lattice, we find a rich variety of dynamical phases of vortices. The onset of these different phases is described by the force balance of a driving force, a pinning force, and vortex-vortex interactions. In particular, when the optical lattice rotates faster than the condensate, an incommensurate effect leads to a vortex-liquid phase supported by the competition between the driving force and the dissipation.