Many-Body Signatures of Collective Decay in Atomic Chains.
Many-Body Signatures of Collective Decay in Atomic Chains.
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原子链集体衰变的多体特征。
DOI：
10.1103/physrevlett.125.263601
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发表时间：
2020
影响因子：
8.6
通讯作者：
A. Asenjo
中科院分区：
文献类型：
--
作者：
Stuart J. Masson;I. Ferrier;L. Orozco;A. Browaeys;A. Asenjo
完全反转的原子被放置在完全相同的位置，它们在去激发时同步，光以爆发的形式发射(被称为“Dicke的超辐射”)。我们研究了有限原子间间隔对介观链中关联衰变的作用，并提供了对集体跳跃算符的理解。我们发现，尽管哈密顿偶极-偶极相互作用，超辐射爆发在很小的距离内仍然存在。然而，对于较大的分离，不同跳跃操作符之间的竞争会导致去相，从而抑制超辐射。对于晶格常数为波长量级的阵列，集体效应仍然很重要，并导致光子发射率随时间非指数衰减。我们计算了双光子关联函数，证明了发射是关联的和定向的，并且对原子间距离的微小变化很敏感。这些特征可以在当前的实验设置中进行测量，并且对现实中的缺陷具有很强的抵抗力。
Fully inverted atoms placed at exactly the same location synchronize as they deexcite, and light is emitted in a burst (known as "Dicke's superradiance"). We investigate the role of finite interatomic separation on correlated decay in mesoscopic chains and provide an understanding in terms of collective jump operators. We show that the superradiant burst survives at small distances, despite Hamiltonian dipole-dipole interactions. However, for larger separations, competition between different jump operators leads to dephasing, suppressing superradiance. Collective effects are still significant for arrays with lattice constants of the order of a wavelength, and lead to a photon emission rate that decays nonexponentially in time. We calculate the two-photon correlation function and demonstrate that emission is correlated and directional, as well as sensitive to small changes in the interatomic distance. These features can be measured in current experimental setups, and are robust to realistic imperfections.
影响因子：
56.9
作者：
Endres, Manuel;Bernien, Hannes;Lukin, Mikhail D.
通讯作者：
Lukin, Mikhail D.
影响因子：
12.5
作者：
Brown, M. O.;Thiele, T.;Regal, C. A.
通讯作者：
Regal, C. A.
影响因子：
64.8
作者：
Kumar, Aishwarya;Wu, Tsung-Yao;Weiss, David S.
通讯作者：
Weiss, David S.