Hydrodynamics of a Multi-Component Bosonic Superfluid  

作　　者：张帆 尹澜 Fan Zhang;Lan Yin(School of Physics,Peking University,Beijing 100871,China)

机构地区：[1]School of Physics,Peking University,Beijing 100871,China

出　　处：《Chinese Physics Letters》2023年第6期39-43,共5页中国物理快报（英文版）

摘　　要：We obtain the superfluid hydrodynamic equations of a multi-component Bose gas with short-ranged interactions at zero temperature under the local equilibrium assumption and show that the quantum pressure is generally present in the nonuniform case. Our approach can be extended to systems with long-range interactions such as dipole-dipole interactions by treating the Hartree energy properly. For a highly symmetric superfluid, we obtain the excitation spectrum and show that except for the density phonon, all other excitations are all degenerate.The implication of our results is discussed.

关 键 词：excitation DIPOLE HARTREE 

分 类 号：O35[理学—流体力学]