We explore coherent multi-photon processes in ⁸⁷Rb¹³³Cs molecules using 3-level lambda and ladder configurations of rotational and hyperfine states, and discuss their relevance to future applications in quantum computation and quantum simulation. In the lambda configuration, we demonstrate the driving of population between two hyperfine levels of the rotational ground state via a two-photon Raman transition. Such pairs of states may be used in the future as a quantum memory, and we measure a Ramsey coherence time for a superposition of these states of 58(9) ms. In the ladder configuration, we show that we can generate and coherently populate microwave dressed states via the observation of an Autler–Townes doublet. We demonstrate that we can control the strength of this dressing by varying the intensity of the microwave coupling field. Finally, we perform spectroscopy of the rotational states of ⁸⁷Rb¹³³Cs up to N = 6, highlighting the potential of ultracold molecules for quantum simulation in synthetic dimensions. By fitting the measured transition frequencies we determine a new value of the centrifugal distortion coefficient D_v = h × 207.3(2) Hz.

中文翻译：

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具有多个微波场的超冷87Rb133Cs分子内部状态的相干操纵

我们使用旋转态和超精细态的三能级λ和梯形构型探索⁸⁷ Rb ¹³³ Cs分子中的相干多光子过程，并讨论它们与未来在量子计算和量子模拟中的应用相关。在lambda配置中，我们演示了通过双光子拉曼跃迁在旋转基态的两个超精细水平之间驱动种群。这样的状态对将来可能会用作量子存储器，并且我们为这些状态的叠加58（9）ms测量了Ramsey相干时间。在阶梯配置，我们表明，我们可以生成和连贯填入微波穿着状态通过Autler-Townes双峰的观察。我们证明了我们可以通过改变微波耦合场的强度来控制这种敷料的强度。最后，我们对高达N = 6的⁸⁷ Rb ¹³³ Cs的旋转状态进行了光谱学分析，突出了超冷分子在合成尺寸量子模拟中的潜力。通过拟合测得的跃迁频率，我们确定了离心变形系数D _v = h ×207.3（2）Hz的新值。