Inelastic collisions of ultracold triplet Rb2 molecules in the rovibrational ground state
Inelastic collisions of ultracold triplet Rb2 molecules in the rovibrational ground state
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超冷三重态 Rb2 分子在振动基态下的非弹性碰撞
DOI：
10.1038/ncomms14854
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发表时间：
2017
影响因子：
16.6
通讯作者：
J. Hecker Denschlag
中科院分区：
文献类型：
--
作者：
B. Drews;M. Deiß;K. Jachymski;Z. Idziaszek;J. Hecker Denschlag
在量子水平上探索和控制非弹性碰撞和反应碰撞是超冷化学发展的主要目标。为此，在定制的环境中制备精确定义的初始原子和分子状态是必要的。本文介绍了准一维势管阵列中亚稳态超冷Rb2分子非弹性碰撞的实验研究。特别是，我们调查的碰撞分子在绝对最低的三重态能级，任何非弹性过程需要改变的电子状态。值得注意的是，我们发现类似的衰变率之间的碰撞旋转或振动激发三重态分子的其他衰变路径也可用。衰变率接近的通用反应，但变化很大时，约束和碰撞能量的变化。这可能被用来控制分子的碰撞性质。
Exploring and controlling inelastic and reactive collisions on the quantum level is a main goal of the developing field of ultracold chemistry. For this, the preparation of precisely defined initial atomic and molecular states in tailored environments is necessary. Here we present experimental studies of inelastic collisions of metastable ultracold Rb2molecules in an array of quasi-1D potential tubes. In particular, we investigate collisions of molecules in the absolute lowest triplet energy level where any inelastic process requires a change of the electronic state. Remarkably, we find similar decay rates as for collisions between rotationally or vibrationally excited triplet molecules where other decay paths are also available. The decay rates are close to the ones for universal reactions but vary considerably when confinement and collision energy are changed. This might be exploited to control the collisional properties of molecules.