巨原子诱导耦合腔阵列中的高阶输出零点

中文摘要 AI 辅助

相干完美吸收、零透射和零反射是由厄米和非厄米系统中的干涉工程控制的几种散射现象。高阶相干完美吸收可以显著拓宽吸收带宽，而现有的实现依赖于由异常点引起的散射零点简并或入射波中引入的额外动量相关相位延迟。我们提出了一种方案，其中巨原子在两个空间分离的位置耦合到一维耦合腔阵列。巨原子的空间分离耦合配置产生了可调的非局域干涉相位，这些相位主导了散射干涉过程。我们进一步研究了单侧入射下的零反射和零透射行为。值得注意的是，我们发现对于某些参数选择，零透射可以持续存在于整个传播带，而不是仅限于单一动量。我们的结果表明，巨原子干涉机制能够在没有异常点和入射动量相关相位延迟的情况下实现带宽增强的相干完美吸收和带宽增强的零透射。我们的工作为耦合腔量子网络中的相干波操纵提供了一条物理途径。

英文摘要

Coherent perfect absorption, zero transmission and zero reflection are several scattering phenomena governed by interference engineering in Hermitian and non-Hermitian systems. Higher-order coherent perfect absorption can significantly broaden the absorption bandwidth, while existing implementations rely on scattering zero degeneracy induced by exceptional points or additional momentum-dependent phase delays introduced in incident waves. We propose a scheme where a giant atom couples to a one-dimensional coupled-cavity array at two spatially separated sites. The spatially separated coupling configuration of the giant atom generates tunable nonlocal interference phases that dominate the scattering interference process. We further investigate the zero-reflection and zero-transmission behaviors under single-sided incidence. Remarkably, we find that for certain parameter choices, zero transmission can persist over the entire propagating band, rather than being restricted to a single momentum. Our results reveal that the giant-atom interference mechanism enables bandwidth-enhanced coherent perfect absorption and bandwidth-enhanced zero transmission in the absence of exceptional points and incident momentum-dependent phase delays. Our work provides a physical route for coherent wave manipulation in coupled-cavity quantum networks.

发表机构

• Center for Quantum Sciences and School of Physics, Northeast Normal University（东北师范大学量子科学中心与物理学院）

机构由 AI 辅助整理，请以论文原文为准。