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arXiv 2201.05329quant-ph
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含双巨原子的波导QED结构中的单光子输运

Manipulating single-photon transport in a waveguide-QED structure containing two giant atoms

S. L. Feng, W. Z. Jia

摘要:

研究了含两个巨原子的波导QED结构中的相干单光子输运。导出了适用于不同拓扑结构的单光子散射振幅的统一解析表达式。详细分析了不同参数下的光谱特性,特别是非对称Fano线型和类电磁感应透明(EIT)光谱。具体地说,我们发现Fano线形的出现不仅受耦合点之间的相位延迟的影响,而且系统的拓扑结构。通过对主方程的分析,总结了类EIT谱出现的一般条件,并通过检验散射谱的解析表达式,验证了这些条件的正确性。这些现象可能为控制和操纵未来量子网络中的光子传输提供强有力的工具。

英文摘要:

We investigate coherent single-photon transport in a waveguide-QED structure containing two giant atoms. The unified analytical expressions of the single-photon scattering amplitudes applicable for different topological configurations are derived. The spectroscopic characteristics in different parameter regimes, especially the asymmetric Fano line shapes and the electromagnetically induced transparency (EIT)-like spectra, are analyzed in detail. Specifically, we find that the appearance of Fano line shapes is influenced by not only the phase delays between coupling points but also the topologies of system. We also summarize the general conditions for appearance of EIT-like spectra by analyzing the master equation and verify these conditions by checking the corresponding analytical expressions of the scattering spectra. These phenomena may provide powerful tools for controlling and manipulating photon transport in future quantum networks.

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