具有综合规范场的四势阱中玻色-爱因斯坦凝聚体的回旋动力学
Cyclotron dynamics of a Bose-Einstein condensate in a quadruple-well potential with synthetic gauge fields
摘要：
本文研究了具有人工规范场的四势阱中玻色-爱因斯坦凝聚体的回旋动力学。我们利用激光辅助隧穿产生大的可调谐有效磁场的BEC。BEC的平均位置遵循一个模拟带电粒子在磁场中的回旋轨道的轨道。在没有原子相互作用的情况下，原子动力学可以表现出周期或准周期的回旋轨道。在存在原子相互作用的情况下，系统会表现出自陷现象，这取决于合成规范场和原子相互作用强度。特别是，合成规范场与原子相互作用的竞争导致了多个不连续的参数窗口的产生，这与没有合成规范场时的情况明显不同。
英文摘要：
We investigate the cyclotron dynamics of Bose-Einstein condensate (BEC) in a quadruple-well potential with synthetic gauge fields. We use laser-assisted tunneling to generate large tunable effective magnetic fields for BEC. The mean position of BEC follows an orbit that simulated the cyclotron orbits of charged particles in a magnetic field. In the absence of atomic interaction, atom dynamics may exhibit periodic or quasi-periodic cyclotron orbits. In the presence of atomic interaction, the system may exhibit self-trapping, which depends on synthetic gauge fields and atomic interaction strength. In particular, the competition between synthetic gauge fields and atomic interaction leads to the generation of several discontinuous parameter windows for the transition to self-trapping, which is obviously different from that without synthetic gauge fields.
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