论文标题
在Ultracold $^{23} $ NA $^{87} $ rb旋转混合物中观察谐振偶性碰撞
Observation of resonant dipolar collisions in ultracold $^{23}$Na$^{87}$Rb rotational mixtures
论文作者
论文摘要
我们报告了对超电位玻色子$^{23} $ na $^{87} $ rb分子的旋转状态混合物中偶极碰撞的调查。相反平方的旋转状态下分子之间的较大谐振偶极 - 偶极相互作用也会对其碰撞进行重大修改，即使不存在电场。在这项工作中，通过测量混合物中的两体损耗率常数来揭示这种效果。另外，可以通过微波光谱以不同的旋转水平制备NARB混合物来调整偶极相互作用强度。当旋转水平的组合不是最低的能量时，还会观察到超细变化碰撞的贡献。我们测得的损耗率常数与量子关闭耦合计算非常吻合，我们也详细介绍了。
We report the investigation on dipolar collisions in rotational state mixtures of ultracold bosonic $^{23}$Na$^{87}$Rb molecules. The large resonant dipole-dipole interaction between molecules in rotational states of opposite parities brings about significant modifications to their collisions, even when an electric field is not present. In this work, this effect is revealed by measuring the dramatically enhanced two-body loss rate constants in the mixtures. In addition, the dipolar interaction strength can be tuned by preparing the NaRb mixture in different rotational levels with microwave spectroscopy. When the rotational level combination is not of the lowest energy, contributions from hyperfine changing collisions are also observed. Our measured loss rate constants are in good agreement with a quantum close-coupling calculation which we also present in full detail.
