Hydrodynamics of a Multi-Component Bosonic Superfluid

作     者：张帆 尹澜 Fan Zhang;Lan Yin

作者机构：School of PhysicsPeking UniversityBeijing 100871China 

出 版 物：《Chinese Physics Letters》 (中国物理快报（英文版）)

年 卷 期：2023年第40卷第6期

页      面：39-43页

核心收录：

学科分类：080704[工学-流体机械及工程] 080103[工学-流体力学] 08[工学] 0807[工学-动力工程及工程热物理] 0801[工学-力学（可授工学、理学学位）] 

基　　金：We would like to thank Z. Q. Yu for his helpful discussion 

主　　题：excitation dipole Hartree 

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 *** implication of our results is discussed.