共心双环外势中两分量偶极玻色-爱因斯坦凝聚体的基态结构研究∗

摘要

利用虚时演化方法研究了共心双环外势中具有偶极-偶极相互作用的两分量玻色-爱因斯坦凝聚体的基态结构，探索了接触相互作用和长程各向异性的偶极-偶极相互作用对系统基态的影响。研究发现，偶极-偶极相互作用作为系统的又一调控参数，可用于得到系统的不同的基态相，并用于控制不同基态相间的转化。%By using the imaginary-time propagation method, we study the ground state structure of a two-component dipolar Bose-Einstein condensate confined in a coupled annular potential. The effects of contact and dipole-dipole interaction on the ground state density distribution of such a system are investigated in detail. The results show that the dipole-dipole interaction, acting as a new degree of freedom, can be used to obtain the desired ground state phases, and to control the phase transition between different ground states.