Collective modes of a Fermi superfluid containing vortices along the BEC-BCS crossover
Collective modes of a Fermi superfluid containing vortices along the BEC-BCS crossover
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DOI：
10.1103/physreva.73.025601
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发表时间：
2005-10
影响因子：
2.9
通讯作者：
T. Ghosh;K. Machida
中科院分区：
文献类型：
--
作者：
T. Ghosh;K. Machida
采用粗粒平均流体力学方法，计算了含涡旋晶格的旋转费米超流体沿玻色-爱因斯坦凝聚体-巴克尔-库珀-施里弗（BEC-BCS）交叉点沿着所有区域的低能横向激发谱.在快旋区，分子BEC进入最低的朗道能级，而在幺正区和BCS区，超流占据了许多低的朗道能级。当转速接近径向陷阱频率时，BEC和么正性极限处的呼吸模式频率之间的差异缩小到零，与非旋转系统中的有限差异相反。
Using the coarse-grain averaged hydrodynamic approach, we calculate all low energy transverse excitation spectrum of a rotating Fermi superfluid containing vortex lattices for all regimes along the Bose-Einstein condensate-Bardeen-Cooper-Schrieffer (BEC-BCS) crossover. In the fast rotating regime, the molecular BEC enters into the lowest Landau level, but the superfluid in the unitarity and the BCS regimes occupies many low-lying Landau levels. The difference between the breathing mode frequencies at the BEC and unitarity limit shrinks to zero as the rotation speed approaches the radial trap frequency, in contrast to the finite difference in the nonrotating systems.