Li Yuqing, Zhang Jiahui, Wang Yunfei, Du Huiying, Wu Jizhou, Liu Wenliang, Mei Feng, Ma Jie, Xiao Liantuan, Jia Suotang
State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Laser Spectroscopy, Shanxi University, Taiyuan, 030006, China.
Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan, Shanxi, 030006, China.
Light Sci Appl. 2022 Jan 7;11(1):13. doi: 10.1038/s41377-021-00702-7.
Synthetic gauge fields in synthetic dimensions are now of great interest. This concept provides a convenient manner for exploring topological phases of matter. Here, we report on the first experimental realization of an atom-optically synthetic gauge field based on the synthetic momentum-state lattice of a Bose gas of Cs atoms, where magnetically controlled Feshbach resonance is used to tune the interacting lattice into noninteracting regime. Specifically, we engineer a noninteracting one-dimensional lattice into a two-leg ladder with tunable synthetic gauge fields. We observe the flux-dependent populations of atoms and measure the gauge field-induced chiral currents in the two legs. We also show that an inhomogeneous gauge field could control the atomic transport in the ladder. Our results lay the groundwork for using a clean noninteracting synthetic momentum-state lattice to study the gauge field-induced topological physics.
合成维度中的合成规范场如今备受关注。这一概念为探索物质的拓扑相提供了一种便捷方式。在此，我们报告基于铯原子玻色气体的合成动量态晶格首次实现原子光学合成规范场的实验，其中利用磁控费什巴赫共振将相互作用晶格调谐至非相互作用状态。具体而言，我们将一个非相互作用的一维晶格设计成具有可调合成规范场的两腿梯子结构。我们观测了原子的磁通依赖布居，并测量了两腿中规范场诱导的手征电流。我们还表明，非均匀规范场可控制梯子中原子的输运。我们的结果为利用纯净的非相互作用合成动量态晶格研究规范场诱导的拓扑物理奠定了基础。
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