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arXiv 2507.00935quant-ph
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通过波导耦合的布拉格与反布拉格超原子中可调集体量子态实现光操控

Light Manipulation via Tunable Collective Quantum States in Waveguide-Coupled Bragg and Anti-Bragg Superatoms

Zhengqi Niu, Wei Nie, Daqiang Bao, Xiaoliang He, Wanpeng Gao, Kuang Liu, I. -C. Hoi, Yu-xi Liu, Xiaoming Xie, Zhen Wang, Zhi-Rong Lin

AI总结:

本文实验研究由八个超导人工原子构成的一维波导量子电动力学系统,通过设计布拉格与反布拉格两种原子间距并调控原子频率,实现了集体诱导透明和宽带光子带隙等可调光操控现象,展示了其在量子器件中的应用潜力。

摘要:

由超辐射态和亚辐射态等集体量子态构成的多体量子系统,在光与物质相互作用中表现为一个多能级超原子。本工作中,我们在波导量子电动力学体系中,利用周期性排列的超导人工原子,实验研究了一维超原子。我们设计了具有两种不同最近邻间距的周期性原子阵列,即 $d$=$λ_0/2$ 和 $d$=$λ_0/4$,分别对应布拉格散射条件和反布拉格散射条件。该系统由八个原子组成,排列方式保持这些特定的原子间距。通过调控原子频率,我们改变了布拉格超原子和反布拉格超原子,从而产生了明显不同的量子光学现象,例如集体诱导透明和宽带光子带隙。此外,由于超导量子电路中存在强波导-原子耦合,在小尺寸系统中实现了高效的光操控。我们的工作展示了布拉格超原子和反布拉格超原子可调的光学特性,以及它们在量子器件中的潜在应用。

英文摘要:

A many-body quantum system which consists of collective quantum states, such as superradiant and subradiant states, behaves as a multi-level superatom in light-matter interaction. In this work, we experimentally study one-dimensional superatoms in waveguide quantum electrodynamics with a periodic array of superconducting artificial atoms. We engineer the periodic atomic array with two distinct nearest-neighbor spacings, i.e., $d$=$λ_0/2$ and $d$=$λ_0/4$, which correspond to Bragg and anti-Bragg scattering conditions, respectively. The system consists of eight atoms arranged to maintain these specific interatomic distances. By controlling atomic frequencies, we modify Bragg and anti-Bragg superatoms, resulting in distinctly different quantum optical phenomena, such as collectively induced transparency and a broad photonic bandgap. Moreover, due to strong waveguide-atom couplings in superconducting quantum circuits, efficient light manipulations are realized in small-size systems. Our work demonstrates tunable optical properties of Bragg and anti-Bragg superatoms, as well as their potential applications in quantum devices.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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