各向异性势阱中的少量涡旋
Small Numbers of Vortices in Anisotropic Traps
摘要：
我们研究了二维各向异性旋转玻色-爱因斯坦凝聚体中涡旋和涡旋晶格的出现。一旦各向异性达到临界值，在基态的涡核的位置不再由Abrikosov晶格几何形状给出，而是由线性排列。利用变分方法，我们确定了单个涡的临界搅拌频率以及少量涡的平衡位置。
英文摘要：
We investigate the appearance of vortices and vortex lattices in two-dimensional, anisotropic and rotating Bose-Einstein condensates. Once the anisotropy reaches a critical value, the positions of the vortex cores in the ground state are no longer given by an Abrikosov lattice geometry, but by a linear arrangement. Using a variational approach, we determine the critical stirring frequency for a single vortex as well as the equilibrium positions of a small number of vortices.
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