用于携带自旋和轨道角动量的单光子的量子路由器。

Quantum Router for Single Photons Carrying Spin and Orbital Angular Momentum.

作者信息

Chen Yuanyuan, Jiang Dong, Xie Ling, Chen Lijun

机构信息

State Key Laboratory for Novel Software Technology, Nanjing University, Nanjing, 210046, P.R. China.

出版信息

Sci Rep. 2016 Jun 3;6:27033. doi: 10.1038/srep27033.

DOI:10.1038/srep27033

PMID:27256772

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC4891736/

Abstract

Quantum router is an essential element in the quantum network. Here, we present a fully quantum router based on interaction free measurement and quantum dots. The signal photonic qubit can be routed to different output ports according to one control electronic qubit. Besides, our scheme is an interferometric method capable of routing single photons carrying either spin angular momentum (SAM) or orbital angular momentum (OAM), or simultaneously carrying SAM and OAM. Then we describe a cascaded multi-level quantum router to construct a one-to-many quantum router. Subsequently we analyze the success probability by using a tunable controlled phase gate. The implementation issues are also discussed to show that this scheme is feasible.

摘要

量子路由器是量子网络中的一个关键元件。在此，我们展示了一种基于无相互作用测量和量子点的全量子路由器。信号光子量子比特可根据一个控制电子量子比特被路由到不同的输出端口。此外，我们的方案是一种干涉测量方法，能够对携带自旋角动量（SAM）或轨道角动量（OAM）、或同时携带SAM和OAM的单光子进行路由。然后我们描述了一种级联多能级量子路由器以构建一个一对多量子路由器。随后我们使用一个可调谐控制相位门来分析成功概率。还讨论了实现问题以表明该方案是可行的。