Optical waveguiding by atomic entanglement in multilevel atom arrays
Optical waveguiding by atomic entanglement in multilevel atom arrays
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DOI：
10.1073/pnas.1911467116
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发表时间：
2019-12-17
影响因子：
11.1
通讯作者：
Chang, Darrick E.
中科院分区：
文献类型：
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作者：
Asenjo-Garcia, Ana;Kimble, H. J.;Chang, Darrick E.
近年来，亚波长原子阵列或其他量子发射体的光学性质引起了人们极大的兴趣。例如，发射光的强相长或相消干涉使阵列能够充当近乎完美的镜子，支持拓扑边缘状态，并允许指数更好的量子存储器。在这些提议中，假设的原子结构很简单，由一个独特的电子基态组成。在线性光学中，该系统相当于经典介电粒子的周期性阵列，其周期性支持导模的出现。然而，目前还不知道这种现象是否持续存在的超精细结构，如大多数量子发射体所表现出的。在这里，我们表明，波导可以产生丰富的原子纠缠作为一个量子多体效应，并阐明了必要的条件。我们的工作代表了理解具有现实电子结构的原子阵列中的集体效应的重要一步。
The optical properties of subwavelength arrays of atoms or other quantum emitters have attracted significant interest recently. For example, the strong constructive or destructive interference of emitted light enables arrays to function as nearly perfect mirrors, support topological edge states, and allow for exponentially better quantum memories. In these proposals, the assumed atomic structure was simple, consisting of a unique electronic ground state. Within linear optics, the system is then equivalent to a periodic array of classical dielectric particles, whose periodicity supports the emergence of guided modes. However, it has not been known whether such phenomena persist in the presence of hyperfine structure, as exhibited by most quantum emitters. Here, we show that waveguiding can arise from rich atomic entanglement as a quantum many-body effect and elucidate the necessary conditions. Our work represents a significant step forward in understanding collective effects in arrays of atoms with realistic electronic structure.