Deeply subrecoil two-dimensional Raman cooling

Deeply subrecoil two-dimensional Raman cooling
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深度亚反冲二维拉曼冷却

DOI:
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发表时间:
2004
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通讯作者:
W. Phillips
W. Phillips
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作者:
V. Boyer;L. Lising;S. Rolston;W. Phillips

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我们报告的实施二维拉曼冷却计划使用顺序激发沿着正交轴。利用方波脉冲,我们将超冷铯原子云冷却到均方根速度分布为0.39(5)反冲速度,对应于30 nK(0.15 T {sub rec})的有效横向温度。这种技术可以用于改进冷原子原子钟,特别是与微重力下的时钟有关。
We report the implementation of a two-dimensional Raman cooling scheme using sequential excitations along the orthogonal axes. Using square pulses, we have cooled a cloud of ultracold cesium atoms down to an rms velocity spread of 0.39(5) recoil velocities, corresponding to an effective transverse temperature of 30 nK (0.15T{sub rec}). This technique can be useful to improve cold-atom atomic clocks and is particularly relevant for clocks in microgravity.