Continuous-Variable Quantum Secure Direct Communication Based on Gaussian Mapping

被引：54
作者：
Cao, Zhengwen [1 ]
Wang, Lei [1 ]
Liang, Kexin [1 ]
Chai, Geng [1 ]
Peng, Jinye [1 ]
机构：
[1] Northwest Univ, Sch Informat Sci & Technol, Lab Quantum Informat & Technol QIT, Xian 710127, Peoples R China
来源：
PHYSICAL REVIEW APPLIED | 2021年 / 16卷 / 02期
基金：
中国国家自然科学基金;
关键词：
Gaussian distribution - Quantum communication - Modulation - Quantum cryptography - Light transmission;
D O I：
10.1103/PhysRevApplied.16.024012
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Quantum secure direct communication (QSDC) realizes the transmission of secret messages directly in a quantum channel. A continuous -variable-(CV) based quantum-communication system allows high-speed, large-capacity information transmission in optical telecommunication systems. In this work, we propose a QSDC protocol based on Gaussian mapping. As for Gaussian modulation, the designed Gaussian-mapping scheme effectively solves the problem, which results from the nonuniformity of the secret-message bit stream, and is applicable to different modulation variances. The system performance analysis shows that the proposed scheme can realize inerrant Gaussian modulation of secret messages, and secure transmission of messages under information theory. Moreover, our work hopes to stimulate discussion on experimental realization and practical advance of CV-QSDC protocol.
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页数：10
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