论文标题
精确旋转超级转子
Precisely Spun Super Rotors
论文作者
论文摘要
改进的分子量子状态的光学控制有望在量子体制中的化学，基本物理学的精确测试和量子信息处理中进行新的应用。尽管许多工作试图准备基础状态分子，但激发态也令人感兴趣。我们展示了一种宽带光学方法，将被困的Sio $^+$分子泵入纯超级转子合奏中，维护了数分钟。超级转子集合泵送到旋转状态$ n = 67 $，对应于9400 K分布的峰值，具有狭窄的$ n $ spread与几个kelvin样品的差异，并用于以前未观察到的C $^2π$状态的光谱。超级转子的显着离心失真泵送到$ n = 230 $允许探测Sio $^+$的电子结构远离其平衡键长的长度。
Improved optical control of molecular quantum states promises new applications including chemistry in the quantum regime, precision tests of fundamental physics, and quantum information processing. While much work has sought to prepare ground state molecules, excited states are also of interest. We demonstrate a broadband optical approach to pump trapped SiO$^+$ molecules into pure super rotor ensembles maintained for many minutes. Super rotor ensembles pumped up to rotational state $N=67$, corresponding to the peak of a 9400 K distribution, had a narrow $N$ spread comparable to that of a few-kelvin sample, and were used for spectroscopy of the previously unobserved C$^2Π$ state. Significant centrifugal distortion of super rotors pumped up to $N=230$ allowed probing electronic structure of SiO$^+$ stretched far from its equilibrium bond length.
