用调制梯度磁场合成可调谐自旋轨道耦合
Tunable spin-orbit coupling synthesized with a modulating gradient magnetic field
摘要：
报道了超冷$^{87}$ Rb原子在超精细自旋1态的可调谐自旋轨道耦合（SOC）观测结果.与以往大多数采用拉曼耦合激光合成赝自旋为1/2的原子SOC的实验不同，我们提出的方案采用了梯度磁场（GMF），原子处于基态，不受原子自发发射的影响. SOC的影响通过以下研究得到证实：1）在合成的SOC突然开启后，谐波阱中原子凝聚体的集体偶极振荡; 2）当SOC强度缓慢上升时，在有限的自旋调整动量下的最小能态。旋量凝聚体的相干性在与调制的GMF相互作用后仍然非常好，这促使人们热情地声称，我们的工作提供了一个新的剧目，旨在与冷原子的量子模拟研究的合成规范场。
英文摘要：
We report the observation of tunable spin-orbit coupling (SOC) for ultracold $^{87}$Rb atoms in hyperfine spin-1 states. Different from most earlier experiments where atomic SOC of pseudo-spin-1/2 are synthesized with Raman coupling lasers, the scheme we demonstrate employs a gradient magnetic field (GMF) with ground state atoms and is immune to atomic spontaneous emission. The effect of the SOC is confirmed through the studies of: 1) the collective dipole oscillation of an atomic condensate in a harmonic trap after the synthesized SOC is abruptly turned on; and 2) the minimum energy state at a finite adiabatically adjusted momentum when the SOC strength is slowly ramped up. The coherence properties of the spinor condensates remain very good after interacting with modulating GMFs, which prompts the enthusiastic claim that our work provides a new repertoire for synthesized gauge fields aimed at quantum simulation studies with cold atoms.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
