超冷费米气体40K中束缚分子的高分辨率能谱

对超冷分子进行量子操控是目前超冷原子分子领域的一个研究热点，它在基础物理，精确测量，量子计算，量子信息等领域有着广泛的应用前景。由于分子结构中复杂的电子的，旋转转动结构，使的直接冷却分子面临着巨大的困难。最近人们在超冷原子气体中，采用Feshbach共振调节原子之间的相互作用制造出纳开尔文量级的超冷弱束缚分子。我们实验上已经制备出超冷费米原子40K组成的弱束缚分子，这为我们得到高分辨率的基态和激发态分子能谱提供了实验平台。本项目将在超冷费米气体40K组成的弱束缚分子的样品上，采用射频、微波、单色光来实现弱束缚分子与其他分子态的跃迁，通过观测分子数目的损耗，温度变化等来得到高分辨率的分子能谱，研究分子与原子之间、分子与分子之间的相互作用、外部束缚势的形状、分子的温度、密度等对能谱的影响。基于这样的测量，我们可以实现超冷原子分子的精密操控，为下一步将分子制备到绝对基态，并冷却分子到更低的温度。

Ultracold molecules under quantum control is a hot topic in the regime of ultracold atomic and molecules, which explore many emergent and exciting research topics in fundamental physics,quantum computing and quantum information. Recently the coldest weakly bound molecules, at temperatures in the nanokelvin range, are created by Feshbach association in ultracold atomic gases.In our lab, we have reported on observation of Feshbach weakly bound molecules in ultracold Fermi gases, offering new opportunities for high resolusion spectroscopy of molecules in ground and excited states. In this project, we will radio frequency,microwave,single color beam to drive bound-bound molecular transition in the ultracold weakly bound molecules in ultracold Fermi gases 40K, which can present the high resolusion spectrosocopy on the number and temperature of molecules. We also study the spectroscopic sensitivity to the interaction of molecules,atoms and molecules, the trap potential, the number and density of molecules. Furthermore, the high resolusion spectroscopy will help us to precisely experimental control the molecules and atoms, and provide better insight into future work, including preparing the molecules in their rotational and vibrational ground state in the lab and cooling to lower temperature.