分形涡和涡格的动力学生成
Dynamical Creation of Fractionalized Vortices and Vortex Lattices
摘要：
研究了钠原子玻色-爱因斯坦凝聚体中分形半量子涡旋的动态产生。我们的模拟结果表明，当施加额外的脉冲磁阱势时，在旋转光阱中可以产生单独的半量子涡旋和涡旋晶格。我们还发现，一个独特的周期性调制的自旋密度波的空间结构总是嵌入在正方形的半量子涡旋晶格，这种结构可以方便地探测通过采取弹道膨胀的冷原子在Stern-Gerlach场的吸收图像。
英文摘要：
We investigate dynamic creation of fractionalized half-quantum vortices in Bose-Einstein condensates of sodium atoms. Our simulations show that both individual half-quantum vortices and vortex lattices can be created in rotating optical traps when additional pulsed magnetic trapping potentials are applied. We also find that a distinct periodically modulated spin-density-wave spatial structure is always embedded in square half-quantum vortex lattices; this structure can be conveniently probed by taking absorption images of ballistically expanding cold atoms in a Stern-Gerlach field.
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