Observation of resonant dipolar collisions in ultracold Na23Rb87 rotational mixtures
Observation of resonant dipolar collisions in ultracold
Na23Rb87
rotational mixtures
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超冷 Na23Rb87 旋转混合物中共振偶极碰撞的观察
DOI:
10.1103/physrevresearch.3.013016
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发表时间:
2019
期刊:
影响因子:
--
通讯作者:
Dajun Wang
中科院分区:
文献类型:
--
作者:
Junyu He;X. Ye;Junyu Lin;Mingyang Guo;G. Qu'em'ener;Dajun Wang
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.
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