Seconds-scale coherence on an optical clock transition in a tweezer array
Seconds-scale coherence on an optical clock transition in a tweezer array
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DOI：
10.1126/science.aay0644
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发表时间：
2019-10-04
期刊：
影响因子：
56.9
通讯作者：
Kaufman, Adam M.
中科院分区：
文献类型：
--
作者：
Norcia, Matthew A.;Young, Aaron W.;Kaufman, Adam M.
原子中高品质因子光学跃迁的相干控制已经彻底改变了精密频率计量学。领先的光学原子钟依赖于对单个离子或中性原子系综中的这种跃迁的询问，以高精度和准确度稳定激光频率。我们展示了一个平台，结合了这两种方法的主要优势，基于光镊内单个锶原子的阵列。我们报告的相干时间为3.4秒，通过重复询问，单系综占空比高达96%，频率稳定性为4.7 x 10（-16）（tau/s）（-1/2）。这些结果确立了光镊阵列作为一个强大的工具，为相干控制的光学跃迁的计量学和量子信息科学。
Coherent control of high-quality factor optical transitions in atoms has revolutionized precision frequency metrology. Leading optical atomic clocks rely on the interrogation of such transitions in either single ions or ensembles of neutral atoms to stabilize a laser frequency at high precision and accuracy. We demonstrate a platform that combines the key strengths of these two approaches, based on arrays of individual strontium atoms held within optical tweezers. We report coherence times of 3.4 seconds, single-ensemble duty cycles up to 96% through repeated interrogation, and frequency stability of 4.7 x 10(-16) (tau/s)(-1/2). These results establish optical tweezer arrays as a powerful tool for coherent control of optical transitions for metrology and quantum information science.