Long-distance optical-conveyor-belt transport of ultracold Cs 133 and Rb 87 atoms
Long-distance optical-conveyor-belt transport of ultracold Cs 133 and Rb 87 atoms
复制标题
超冷 Cs 133 和 Rb 87 原子的长距离光学传送带传输
DOI：
10.1103/physreva.109.023321
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发表时间：
2024
影响因子：
2.9
通讯作者：
Matthies A
中科院分区：
文献类型：
--
作者：
Matthies A
我们报道了在不到25ms的时间内，利用两束频差可控的反向传输光束形成的光学传送带，在约37厘米的范围内传输了超冷铯和Rb原子的热云，产生了可移动的光学晶格。通过仔细选择腰围和焦点位置，我们能够使用两个静态高斯光束进行传输，从而避免了对贝塞尔光束或可变焦距透镜的需要。我们描述了这两个物种的传输效率，包括比较不同的传输轨迹，深入了解损失机制，并找到最小的冲击轨迹是最优的。使用优化的参数，我们能够以高达75%的效率传输铯或Rb原子。为了证明我们的传输方案在使用量子气体显微镜的实验中的可行性，我们在传输后产生了两种物种的玻色-爱因斯坦凝聚体，并给出了两种物种同时传输的测量结果。
We report on the transport of a thermal cloud of ultracold cesium and rubidium atoms over about 37 cm in under 25 ms using an optical conveyor belt formed by two counterpropagating beams with a controllable frequency difference that generate a movable optical lattice. By carefully selecting the waists and focus positions, we are able to use two static Gaussian beams for the transport, avoiding the need for a Bessel beam or variable-focus lenses. We characterize the transport efficiency for both species, including a comparison of different transport trajectories, gaining insight into the loss mechanisms and finding the minimum jerk trajectory to be optimum. Using the optimized parameters, we are able to transport up tocesium or rubidium atoms with an efficiency up to 75%. To demonstrate the viability of our transport scheme for experiments employing quantum gas microscopy, we produce Bose-Einstein condensates of either species after transport and present measurements of the simultaneous transport of both species.