论文标题
最低兰道水平的骨骼超级流体涡流晶体的表面波和散装ruderman模式
Surface waves and bulk Ruderman mode of a bosonic superfluid vortex crystal in the lowest Landau level
论文作者
论文摘要
我们确定并分析了在人造磁场中可压缩的玻色石超流体形成的有限盘形二维涡流的集体正常模式。使用微观毛tau级别的显微镜毛tau理论，我们生成了涡流晶体接地态，并求解Bogoliubov-de Gennes方程以进行小幅度集体振荡。我们发现手性表面波在频率大于散装Tkachenko模式的频率下传播。此外，我们研究了低频散装激发并确定扭转鲁德曼模式，我们发现它被先前开发的低能有效田间理论很好地描述了。
We determine and analyze collective normal modes of a finite disk-shaped two-dimensional vortex crystal formed in a compressible bosonic superfluid in an artificial magnetic field. Using the microscopic Gross-Pitaevskii theory in the lowest Landau level approximation, we generate vortex crystal ground states and solve the Bogoliubov-de Gennes equations for small amplitude collective oscillations. We find chiral surface waves that propagate at frequencies larger than those of the bulk Tkachenko modes. Furthermore, we study low frequency bulk excitations and identify a torsional Ruderman mode, which we find is well-described by a previously developed low-energy effective field theory.
