We investigate theoretically the formation of ultracold ground-state CsYb molecules on the lowest vibrational level via the Feshbach-optimized photoassociation process. Three s-wave Feshbach resonances of CsYb are found. The probability density of the scattering state in the short-range internuclear distance is significantly enhanced near the resonance positions. The population transfer efficiency reaches its maximum when the pulse duration equals half a period of the Rabi oscillation. By using the optimized laser parameters including the peak intensity and detuning, the final population of the lowest vibrational level of the ground electronic state reaches order of 10 −1 in the four-laser scheme.

中文翻译：

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通过Feshbach优化的光缔合形成超冷基态CsYb分子

我们在理论上通过Feshbach优化的光缔合过程研究了最低振动水平上超冷基态CsYb分子的形成。发现CsYb的三个s波Feshbach共振。在共振位置附近，短距离核间距离中散射状态的概率密度显着提高。当脉冲持续时间等于拉比振荡周期的一半时，总体传输效率达到最大值。通过使用包括峰值强度和失谐的优化的激光参数，在四激光方案中，基态电子状态的最低振动级别的最终种群达到10 -1的数量级。