论文标题
耗散量子发射极链中的集体光子路由改进与手性波导Qed梯子强烈耦合
Collective photon routing improvement in a dissipative quantum emitter chain strongly coupled to a chiral waveguide QED ladder
论文作者
论文摘要
我们检查了单个光子在两级量子发射器（QES）的一维周期链中的路由方案，并在梯子构型中强烈耦合到两个波导。众所周知，对于单发射器手性波导梯子的设置，可以将光子从一个波导重定向到另一个波导，只要满足共振条件并完全忽略了自发的发射条件，$ 100 \％$ $概率（确定性地）。但是，当包括自发发射时，路由方案变得非常不完善。在本文中，我们通过考虑一系列QE来提出解决方案，除了发射器之间的波导介导的相互作用之外，还考虑了直接且无限长的偶极 - 偶极相互作用（DDI）。我们表明，强大的DDI保护路由方案不受自发排放损失而产生的集体效应。特别是，我们证明了路由器的操作可以从$ 58 \％$提高到$ 95 \％$，在典型的散发性手性光得多接口中，该接口由纳米线模式组成，与30个量子点的线性链强烈交互。随着手性量子光学的最新实验进展，与锥形纳米纤维相结合的QES被困的QE可以作为实验实现这项工作的平台。
We examine the routing scheme of single photons in a one-dimensional periodic chain of two-level quantum emitters (QEs) strongly coupled to two waveguides in a ladder configuration. It is known that for a single-emitter chiral waveguide ladder setting, photons can be redirected from one waveguide to another with a $100\%$ probability (deterministically) provided the resonance condition is met and spontaneous emission is completely ignored. However, when the spontaneous emission is included the routing scheme becomes considerably imperfect. In this paper, we present a solution to this issue by considering a chain of QEs where in addition to the waveguide mediated interaction among emitters, a direct and infinitely long-ranged dipole-dipole interaction (DDI) is taken into account. We show that the collective effects arising from the strong DDI protect the routing scheme from spontaneous emission loss. In particular, we demonstrate that the router operation can be improved from $58\%$ to $95\%$ in a typical dissipative chiral light-matter interface consisting of nanowires modes strongly interacting with a linear chain of 30 quantum dots. With the recent experimental progress in chiral quantum optics, trapped QEs evanescently coupled to tapered nanofibers can serve as a platform for the experimental realization of this work.
