相对相位对三势阱玻色爱因斯坦凝聚体隧穿特性的影响

Effect of Relative Phase on Triple - well Trapped Bose Einstein Condensates

通过三模近似来处理含三体项的GP方程,讨论了对称三势阱中散射长度周期变化时系统的特性,并以此为基础来分析不同相位情况下定态解的稳定性.研究表明这个体系的隧穿动力学可以被周期变化的散射长度有效的调节,且数值结果展示了相位对系统定态解的稳定性影响起重要作用,系统可通过改变相对相位使系统在自俘获与周期运动状态间转换.

In this paper,three-mode approximation and three coupled Gross-Pitaevskii equations（GPEs） are used to modify the dynamics of the system.The macroscopic quantum tunneling and self-trapping phenomena in triple-well trapped Bose-Einstein condensates（BECs） were discussed,based on which scattering length was periodically modulated.The corresponding numerical results show that this system of the tunneling dynamics can be adjusted by scattering length,and the phase plays an important role in the system of triple well trapped BECs.The tunneling characteristics can be relatively effective controlled by phase.The system is accessible to the self trapping states in π-phase.