论文标题
具有两个或多个耦合点的原子波导系统中的单光子散射和绑定状态
Single-photon scattering and bound states in an atom-waveguide system with two or multiple coupling points
论文作者
论文摘要
在本文中，我们研究了一维耦合谐振器波导中的单光子散射和结合状态，该波导将其与两个或两个或更多耦合点的单个人造巨型原子耦合在一起。当原子夫妇通过两个谐振器与波导夫妇伴侣时，单光子反射率的特征是Breit-Wigner或Fano线形状。当原子通过多个谐振器与波导夫妇伴侣时，我们从数值上展示了破坏性干扰效应如何导致完整的单光子反射。我们还发现了多谐振耦合情况的相变现象，该现象表明，仅当原子波导耦合强度高于临界值时，上限状态才存在。
In this paper, we investigate the single-photon scattering and bound states in a one-dimensional coupled-resonator waveguide which couples to a single artificial giant atom with two or more coupling points. When the atom couples to the waveguide via two resonators, the single-photon reflection rate is characterized by either Breit-Wigner or Fano line shapes. When the atom couples to the waveguide via multiple resonators, we numerically show how the destructive interference effect leads to a complete single-photon reflection. We also find a phase transition phenomena for the multi-resonator coupling case, which reveals that the upper bound state only exists when the atom-waveguide coupling strength is above a critical value.
