Coherent single-atom superradiance
Coherent single-atom superradiance
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DOI：
10.1126/science.aar2179
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发表时间：
2018-02-09
期刊：
影响因子：
56.9
通讯作者：
An, Kyungwon
中科院分区：
文献类型：
--
作者：
Kim, Junki;Yang, Daeho;An, Kyungwon
超辐射是在宏观系统中出现的一种量子现象，即相关的单个原子协同发射光子。控制集体原子-场相互作用的演示是由于能够直接标记原子系综的相关性。在这里，我们报道了腔介导的相干单原子超辐射：具有预定义相关性的单个原子一个接一个地穿过高质量因子腔，与已经穿过腔的N个原子（N代表原子数）合作发射光子。即使当腔内原子序数小于1时，也观察到n平方依赖性的集体光发射增强。利用纳米孔阵列孔径，通过纳米精度的位置控制和原子的相对准状态操纵，实现了单个原子之间的关联。我们的结果展示了一个相位控制原子场相互作用的平台。
Superradiance is a quantum phenomenon emerging in macroscopic systems whereby correlated single atoms cooperatively emit photons. Demonstration of controlled collective atom-field interactions has resulted from the ability to directly imprint correlations with an atomic ensemble. Here we report cavity-mediated coherent single-atom superradiance: Single atoms with predefined correlation traverse a high-quality factor cavity one by one, emitting photons cooperatively with the N atoms that have already gone through the cavity (N represents the number of atoms). Enhanced collective photoemission of N-squared dependence was observed even when the intracavity atom number was less than unity. The correlation among single atoms was achieved by nanometer-precision position control and phase-aligned state manipulation of atoms by using a nanohole-array aperture. Our results demonstrate a platform for phase-controlled atom-field interactions.