论文标题
来自量子发射极的时桶纠缠的多光子状态的保真度
Fidelity of time-bin entangled multi-photon states from a quantum emitter
论文作者
论文摘要
我们设计了一个数学框架，用于评估由单个固态量子发射极产生的多光子纠缠状态的忠诚度，例如量子点或氮气现象中心。在这种形式主义中，我们从理论上研究了实际系统中存在缺陷的作用，对时间键编码的Greenberger-Horne-Zeilinger和一维集群状态的生成。我们考虑了基本的局限性，例如声子诱导的去序列，与核自旋浴的相互作用，二阶排放以及技术缺陷，例如分支效应，非完美滤波和光子损失。在同伴论文中，我们考虑了基于光子晶体波导中嵌入的量子点发射器的特定物理实现，并应用我们的理论形式主义来评估当前技术可实现的保真度。
We devise a mathematical framework for assessing the fidelity of multi-photon entangled states generated by a single solid-state quantum emitter, such as a quantum dot or a nitrogen-vacancy center. Within this formalism, we theoretically study the role of imperfections present in real systems on the generation of time-bin encoded Greenberger-Horne-Zeilinger and one-dimensional cluster states. We consider both fundamental limitations, such as the effect of phonon-induced dephasing, interaction with the nuclear spin bath, and second-order emissions, as well as technological imperfections, such as branching effects, non-perfect filtering, and photon losses. In a companion paper, we consider a particular physical implementation based on a quantum dot emitter embedded in a photonic crystal waveguide and apply our theoretical formalism to assess the fidelities achievable with current technologies.
