Noiseless linear amplification for the single-photon entanglement of arbitrary polarization–time-bin qudit

被引：1

作者：

陈灵泉 ^{[1
,2
]}

盛宇波 ^{[3
,4
]}

周澜 ^{[1
,3
]}

机构：

[1] School of Science Nanjing University of Posts and Telecommunications

[2] College of Electronic and Optical Engineering & College of MicroelectronicsNanjing University of Posts and Telecommunications

[3] Key Laboratory of Broadband Wireless Communication and Sensor Network Technology (Ministry of Education)Nanjing University of Posts and Telecommunications

[4] Institute of Signal Processing Transmission Nanjing University of Posts and Telecommunications

来源：

Chinese Physics B | 2019年 / 01期

基金：

中国博士后科学基金; 中国国家自然科学基金;

关键词：

single-photon entanglement; noiseless linear amplification; polarization–time-bin qudit; complete and partial photon loss;

D O I：

暂无

中图分类号：

O413 [量子论]; TN918.1 [理论];

学科分类号：

070104 ; 070201 ;

摘要：

Single-photon entanglement(SPE) is an important source in quantum communication. In this paper, we put forward a single-photon-assisted noiseless linear amplification protocol to protect the SPE of an arbitrary polarization–time-bin qudit from the photon transmission loss caused by the practical channel noise. After the amplification, the fidelity of the SPE can be effectively increased. Meanwhile, the encoded polarization–time-bin features of the qudit can be well preserved. The protocol can be realized under the current experimental conditions. Moreover, the amplification protocol can be extended to resist complete photon loss and partial photon loss during the photon transmission. After the amplification, we can not only increase the fidelity of the target state, but also solve the decoherence problem simultaneously. Based on the above features, our amplification protocol may be useful in future quantum communication.

引用

页码：210 / 217

页数：8