Noiseless linear amplification of polarization-encoded quantum states with efficient quantum scissors

作     者：Feng, Ya-Peng Gu, Jing-Qiu Zhou, Lan Zhong, Wei Du, Ming-Ming Li, Xi-Yun Sheng, Yu-Bo 

作者机构：Nanjing Univ Posts & Telecommun Coll Elect & Opt Engn Nanjing 210023 Peoples R China Nanjing Univ Posts & Telecommun Coll Flexible Elect Future Technol Nanjing 210023 Peoples R China Nanjing Univ Posts & Telecommun Coll Sci Nanjing 210023 Peoples R China Nanjing Univ Posts & Telecommun Inst Quantum Informat & Technol Nanjing 210003 Peoples R China 

出 版 物：《QUANTUM INFORMATION PROCESSING》 (量子信息处理)

年 卷 期：2024年第23卷第6期

页      面：201-201页

核心收录：

学科分类：07[理学] 070201[理学-理论物理] 0702[理学-物理学] 

基　　金：National Natural Science Foundation of China [12175106, 92365110] National Natural Science Foundation of China [2018B030325002] Key R &D Program of Guangdong Province 

主　　题：Noiseless linear amplification Quantum communication Photon transmission loss Local-quadrature squeezing Polarization-encoding 

摘      要：Polarization-encoded single-photon qubit and single-photon entanglement are important resources of quantum communication. In practical long-distance quantum communication, photon transmission loss caused by the channel noise is a big obstacle. Noiseless linear amplification (NLA) is a useful method to solve the photon transmission loss problem. In the paper, we propose two efficient NLA protocols for the polarization-encoded single-photon qubit and single-photon entanglement, respectively. Our NLA protocols can increase the fidelity of the target photon state and perfectly preserve the encoded polarization feature. Moreover, local-quadrature squeezing operation is introduced into the NLA protocols to further improve the amplification. Our NLA protocols have important application in future quantum communication field.