Long Zhang, Jin-Yi Zhang, Si-Cong Ji, Zhi-Dong Du, Hui Zhai, Youjin Deng, Shuai Chen, Peng Zhang, Jian-Wei Pan
We study the decay behaviors of ultracold atoms in metastable states with spin-orbit (SO) coupling, and demonstrate that there are two SO-coupling-induced decay mechanisms. One arises from the trapping potential and the other is due to interatomic collision. We present general schemes for calculating decay rates from these two mechanisms, and illustrate how the decay rates can be controlled by experimental parameters. We experimentally measure the decay rates over a broad parameter region, and the results agree well with theoretical calculations. This work provides an insight for both quantum simulation involving metastable dressed states and studies on few-body problems with SO coupling.
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http://arxiv.org/abs/1208.4941
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