物理学报Issue(14)：1-7,7.DOI:10.7498/aps.64.140301
基于轨道角动量的多自由度W态纠缠系统∗
Entangled W state of multi degree of freedom system based on orbital angular momentum
摘要
Abstract
We propose a method of generating the three-photon W state. The method uses parametric down-conversion process and hybrid entanglement swapping from multiphoton spin-entangled states to multiphoton orbital angular momentum (OAM) entangled states, with the aid of a pair of polarization photons. They generate W state entangled in different degrees of freedom of polarization and OAM with a high-dimensional Hilbert space. By simply changing the methods of generating a polarization-OAM-linear momentum entangled W state. Our method produces two mutually symmetric W states with strong entanglement and high dimension, which is expected to realize the secure communication of extending quantum bits.关键词
轨道角动量/量子纠缠/W态/多自由度Key words
orbital angular momentum/quantum entanglement/W state/multi degree of freedom引用本文复制引用
范榕华,郭邦红,郭建军,张程贤,张文杰,杜戈..基于轨道角动量的多自由度W态纠缠系统∗[J].物理学报,2015,(14):1-7,7.基金项目
“十二五”国家密码发展基金密码理论课题研究项目(批准号：MMJJ201401011)、广东省省部产学研引导项目(批准号:2012B091100063)和广州市科技计划项目科学研究专项(批准号:2014J4100050)资助的课题.@@@@* Project supported by the Program of the National Code Development Foundation and Cryptography Project Research during the 12st Five-Year Plan Period of China (Grant No. MMJJ201401011), the Program of Provincial Guidance for Producing, Studying and Researching of Guangdong Province, China (Grant No.2012B091100063) and the Program of Science and Technology for the Special Scientific Research, Guangzhou, China (Grant No.2014J4100050) （批准号：MMJJ201401011）
