在光纤中产生偏振/能量-时间以及离散频率/能量-时间的超纠缠。

Generation of hyper-entanglement in polarization/energy-time and discrete-frequency/energy-time in optical fibers.

作者信息

Dong Shuai, Yu Lingjie, Zhang Wei, Wu Junjie, Zhang Weijun, You Lixing, Huang Yidong

机构信息

Tsinghua National Laboratory for Information Science and Technology, Department of Electronic Engineering, Tsinghua University, Beijing, 100084, China.

State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, China.

出版信息

Sci Rep. 2015 Mar 17;5:9195. doi: 10.1038/srep09195.

DOI:10.1038/srep09195

PMID:25779686

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC4361880/

Abstract

In this paper, a generation scheme for telecom band hyper-entanglement is proposed and demonstrated based on the vector spontaneous four wave mixing (SFWM) processes in optical fibers. Two kinds of two-photon states are generated, one is hyper-entangled in the degree of freedoms (DOFs) of energy-time and polarization, the other is hyper-entangled in DOFs of energy-time and discrete-frequency. Experiments of Franson-type interference, two-photon interference under non-orthogonal polarization bases and spatial quantum beating are realized to demonstrate the entanglement in energy-time, polarization and frequency, respectively. This scheme provides a simple way to realize telecom band hyper-entanglement, which has potential for large geographic-scale applications of quantum communication and quantum information over optical fibers.

摘要

本文提出并演示了一种基于光纤中矢量自发四波混频（SFWM）过程的电信波段超纠缠生成方案。产生了两种双光子态，一种是在能量 - 时间和偏振自由度（DOF）上超纠缠，另一种是在能量 - 时间和离散频率自由度上超纠缠。实现了弗兰森型干涉实验、非正交偏振基下的双光子干涉以及空间量子拍频实验，分别证明了在能量 - 时间、偏振和频率上的纠缠。该方案为实现电信波段超纠缠提供了一种简单方法，在光纤量子通信和量子信息的大规模地理应用方面具有潜力。