Laser cooling with adiabatic passage for diatomic molecules.
Laser cooling with adiabatic passage for diatomic molecules.
复制标题
双原子分子绝热通道激光冷却。
DOI：
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发表时间：
2019
期刊：
影响因子：
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通讯作者：
B. Yan
中科院分区：
文献类型：
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作者：
Qian Liang;Tao Chen;W. Bu;Yuhe Zhang;B. Yan
我们提出了一种适用于多能级II类跃迁和具有绝热转移的双原子分子的磁增强激光冷却方案。引入一个角度磁场，不仅可以混合暗态，而且可以将多能级系统按时间顺序分解为几个二能级子系统，从而实现多光子动量转移。对于复杂的多能级双原子分子，尽管增强作用减弱，但我们的模拟仍然预测，与传统的多普勒冷却相比，最大可实现冷却力的值更大，可冷却的速度范围更宽。这种方案减少了对自发辐射的依赖，使得激光冷却具有泄漏通道的分子变得可行。
We present a magnetically enhanced laser cooling scheme applicable to multi-level type-II transitions and further diatomic molecules with adiabatic transfer. An angled magnetic field is introduced to not only remix the dark states, but also decompose the multi-level system into several two-level sub-systems in time-ordering, hence allowing multiple photon momentum transfer. For complex multi-level diatomic molecules, although the enhancement gets weakened, our simulations still predict a $sim 4 imes$ larger value of the maximum achievable cooling force and a wider coolable velocity range compared to the conventional Doppler cooling. A reduced dependence on spontaneous emission of this scheme makes laser cooling a molecule with leakage channels become a feasibility.