超冷分子在精密测量、量子模拟、超冷化学及量子信息科学等研究领域有着广阔的应用前景，高效制备基态超冷分子是开展相关研究的前提与核心任务之一。本项目针对目前基态超冷分子制备过程中由于Feshbach分子寿命短且易解离导致分子产率低的问题，采用Feshbach共振增强光缔合与受激拉曼绝热转移相结合的方案，构建超冷铯原子在Feshbach共振处直接受激拉曼绝热转移的模型，研究Feshbach共振增强超冷铯原子光缔合的物理机制，提高超冷铯原子光缔合形成激发态分子的效率，克服Feshbach分子对基态超冷分子产率的限制，实现从超冷铯原子到基态超冷铯分子的高效转移制备。项目的执行将开辟高效制备超冷分子的新途径，为超冷分子在量子态操控等相关研究领域的应用奠定更为坚实基础。

Ultracold molecules have wide applications in many research fields, such as precision measurement, quantum simulation, ultracold chemistry and quantum information. The efficient formation of ultracold ground state molecules is the prerequisite and key for the applications of ultracold molecules on many research fields. This project focuses on the problem of the low formation efficiency of ultracold molecules induced by the short lifetime and easy dissociation for Feshbach molecules involved in the current formation process of ultracold ground state molecules. We use the combination mechanism of the Feshbach resonance-enhanced photoassociation and the stimulated Raman adiabatic passage to establish the model of the directly stimulated Raman adiabatic passage of ultracold Cs atoms near the Feshbach resonance. By studying the physical mechanism of the Feshbach resonance-enhanced photoassociation of ultracold Cs atoms, we increase the formation efficiency of excited molecules through the photoassociation of ultracold Cs atoms and overcome the influence of Feshbach molecules on the formation rate of ultracold ground state molecules, and realize the efficient formation of ultracold ground state Cs molecules from ultracold Cs atoms. The implementation of project establishes the new method of the efficient formation of ultracold molecules and lays the more solid foundation for the applications of ultracold molecules on many related research fields, such as the manipulation of quantum states.