Ultracold molecules offer great opportunities to study molecular collisions in the quantum regime. At ultralow temperatures, the de Broglie wavelength of the collision partners is much larger than the range of molecular interaction potential, and only the lowest possible partial wave of relative orbital angular momentum dominates the collision process. Therefore, the collisions at ultracold temperatures are highly quantum mechanical. Scattering resonances are among the most remarkable quantum phenomena. They are extremely sensitive to the details of molecule interaction potential and thus offer a unique probe of the potential energy surface governing the collision dynamics. I will talk about our recent work on the observation of magnetically tunable Feshbach resonances in ultracold collisions between potassium-40 (40K) atoms and sodium-23–potassium-40 (23Na40K) molecules in the rovibrational ground state. I will also talk about our recent observation of the interference between resonant STIRAP and detuned STIRAP in creation of ground state molecules.

赵博，中国科学技术大学教授，中组部“青年千人计划”入选者。1997年考入中国科大，在中国科大取得学士学位和硕士学位。2005年到德国海德堡大学攻读博士学位，并于2008年7月取得理学博士学位。之后在海德堡大学、奥地利量子光学和量子信息研究所担任博士后研究员。2012年5月至今任中国科学技术大学教授。长期从事超冷原子和超冷分子的实验研究。在Science、Nature Physics 、Physical Review Letters 等杂志共发表论文40余篇，共被SCI引用2000余次。