Gong Ting, Ji Zhonghua, Du Jiaqi, Zhao Yanting, Xiao Liantuan, Jia Suotang
Shanxi University, State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Laser Spectroscopy, Wucheng Rd 92, 030006 Taiyuan, China.
Phys Chem Chem Phys. 2021 Feb 25;23(7):4271-4276. doi: 10.1039/d1cp00202c.
We demonstrate microwave-assisted coherent control of ultracold 85Rb133Cs molecules in a ladder-type configuration of rotational states. Specifically, we use a probe and a control MW field to address the transitions between the J = 1 → 2 and J = 2 → 3 rotational states of the X1Σ+(v = 0) vibrational level, respectively, and use the control field to modify the response of the probe MW transition by coherently reducing the population of the intermediate J = 2 state. We observe that an increased Rabi frequency of the control field leads to broadening of the probe spectrum splitting and a shift of the central frequency. We apply Akaike's information criterion (AIC) to conclude that the observed coherent spectral response appears across the crossover regime between electromagnetically induced transparency and Aulter-Townes splitting. Our work is a significant development in microwave-assisted quantum control of ultracold polar molecules with multilevel configuration.
我们展示了在旋转态的阶梯型构型中对超冷85Rb133Cs分子的微波辅助相干控制。具体而言，我们分别使用一个探测微波场和一个控制微波场来激发X1Σ+(v = 0)振动态的J = 1 → 2和J = 2 → 3旋转态之间的跃迁，并利用控制场通过相干地减少中间J = 2态的布居来修改探测微波跃迁的响应。我们观察到控制场的拉比频率增加会导致探测光谱分裂变宽和中心频率偏移。我们应用赤池信息准则（AIC）得出结论，观察到的相干光谱响应出现在电磁诱导透明和奥特-唐斯分裂之间的交叉区域。我们的工作是具有多能级构型的超冷极性分子的微波辅助量子控制方面的一项重大进展。
