Molecules cooled below the Doppler limit
Molecules cooled below the Doppler limit
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DOI：
10.1038/nphys4241
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发表时间：
2017-03
期刊：
影响因子：
19.6
通讯作者：
S. Truppe;H. Williams;M. Hambach;L. Caldwell;N. Fitch;E. Hinds;B. Sauer;M. Tarbutt
中科院分区：
文献类型：
--
作者：
S. Truppe;H. Williams;M. Hambach;L. Caldwell;N. Fitch;E. Hinds;B. Sauer;M. Tarbutt
磁光囚禁和亚多普勒冷却对于量子简并气体、光学晶格、原子喷泉和许多其他应用的大多数实验都是必不可少的。一系列广泛的新应用等待着超冷分子，而激光冷却到分子的扩展已经开始，，，。磁光陷阱(MOT)已被证明适用于单一分子物种，但许多应用所需的亚多普勒温度尚未达到。在这里，我们演示了第二个物种CaF的量子光学理论，我们展示了如何使用三维光学糖蜜将这些分子冷却到50 μK，远低于多普勒极限。这些超冷分子可以加载到光钳中，以捕获任意阵列进行量子模拟，发射到分子喷泉中，用于测试基础物理，，，用于研究原子和分子在超低温下的碰撞和化学。
Magneto-optical trapping and sub-Doppler cooling have been essential to most experiments with quantum degenerate gases, optical lattices, atomic fountains and many other applications. A broad set of new applications await ultracold molecules, and the extension of laser cooling to molecules has begun,,,,. A magneto-optical trap (MOT) has been demonstrated for a single molecular species, SrF,,, but the sub-Doppler temperatures required for many applications have not yet been reached. Here we demonstrate a MOT of a second species, CaF, and we show how to cool these molecules to 50 μK, well below the Doppler limit, using a three-dimensional optical molasses. These ultracold molecules could be loaded into optical tweezers to trap arbitrary arrays for quantum simulation, launched into a molecular fountain,for testing fundamental physics,,,,, and used to study collisions and chemistry between atoms and molecules at ultracold temperatures.