论文标题
由短距离光缔合形成的超低地面分子的微波相干控制
Microwave coherent control of ultracold ground-state molecules formed by short-range photoassociation
论文作者
论文摘要
我们报告了通过短距离光伴侣的振动基态形成的超低$^{85} $ rb $^{133} $ rb $^{133} $ rb $^{133} $ rb $^{133} $ rb $^{133} $ rb $^{133}的旋转状态的观察。分子是在单个旋转状态$ x（v = 0，j = 1）$中形成的，令人兴奋的原子对短距离状态$（2）^{3}π_{0^{ - }}（v = 11，j = 0）$，然后是自发衰变。我们使用耗竭光谱记录人口分布的动态演化，并观察到清晰的拉比振荡，同时在耦合的相邻旋转水平之间进行微波跃迁照射。一个密度 - 矩阵形式主义解释了纵向和横向衰减时间，在相干过程和平衡种群中又重现了动态演化。此处报道的相干控制对于研究连贯的量子效应以及连续短距光合并产生的冷极性分子的应用而言是有价值的。
We report the observation of microwave coherent control of rotational states of ultracold $^{85}$Rb$^{133}$Cs 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 $(2)^{3}Π_{0^{-}} (v=11, J=0)$, 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.
