Microwave coherent control of ultracold ground-state molecules formed by short-range photoassociation
Microwave coherent control of ultracold ground-state molecules formed by short-range photoassociation
复制标题
短程光缔合形成的超冷基态分子的微波相干控制
DOI：
10.1039/d0cp01191f
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发表时间：
2020
影响因子：
3.3
通讯作者：
Jia Suotang
中科院分区：
文献类型：
--
作者：
Ji Zhonghua;Gong Ting;He Yonglin;Hutson Jeremy M.;Zhao Yanting;Xiao Liantuan;Jia Suotang
报道了用短程光缔合的方法观察到微波相干控制超冷85Rb133Cs分子在其振动基态中形成的旋转态。分子是通过激发原子对到短程态(2)3Π0−(v=11，J=0)，然后自发衰变而形成的单旋转态X(v=0，J=1)。我们用耗尽光谱记录了粒子数分布的动态演化，并观察到当辐照在耦合的相邻转动能级之间的微波跃迁时，明显的拉比振荡。考虑到纵向和横向衰变时间的密度矩阵形式再现了相干过程和平衡布居的动态演化。本文所报道的相干控制对于研究相干量子效应和连续短程光缔合产生的冷极性分子的应用都是有价值的。
We report the observation of microwave coherent control of rotational states of ultracold 85Rb133Cs molecules formed in their vibronic ground state by short-range photoassociation. Molecules are formed in the single rotational state X(v = 0, J = 1) by exciting pairs of atoms to the short-range state (2)3Π0−(v = 11, J = 0), followed by spontaneous decay. We use depletion spectroscopy to record the dynamic evolution of the population distribution and observe clear Rabi oscillations while irradiating on a microwave transition between coupled neighbouring rotational levels. A density-matrix formalism that accounts for longitudinal and transverse decay times reproduces both the dynamic evolution during the coherent process and the equilibrium population. The coherent control reported here is valuable both for investigating coherent quantum effects and for applications of cold polar molecules produced by continuous short-range photoassociation.