Classical channel bandwidth requirements in continuous variable quantum key distribution systems

被引：0

作者：

Almeida, Margarida ^{[1
,2
]}

Pereira, Daniel ^{[1
,2
,3
]}

Pinto, Armando N. ^{[1
,2
]}

Silva, Nuno A. ^{[1
]}

机构：

[1] Univ Aveiro, Campus Univ Santiago, Inst Telecomunicacoes, Aveiro, Portugal

[2] Univ Aveiro, Campus Univ Santiago, Dept Elect Telecommun & Informat, Aveiro, Portugal

[3] Austrian Inst Technol, Vienna, Austria

来源：

IET QUANTUM COMMUNICATION | 2024年 / 5卷 / 04期

关键词：

quantum communication; quantum cryptography; RECONCILIATION;

D O I：

10.1049/qtc2.12103

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The reconciliation method for continuous variable quantum key distribution systems is usually chosen based on its reconciliation efficiency. Nonetheless, one must also consider the requirements of each reconciliation method in terms of the amount of information transmitted on the classical channel. Such may limit the achievable key rates. For instance, multidimensional reconciliation of dimension 8 demands a classical channel bandwidth 43 times greater than that of the quantum channel baud rate. Decreasing the dimension to 4 halves the required bandwidth, allowing for higher quantum channel baud rates and higher key rates for shorter transmission distances, despite the lesser reconciliation performance. The reconciliation method for continuous variable quantum key distribution (CV-QKD) systems is usually chosen based on its reconciliation efficiency. Nonetheless, one must also consider the requirements of each reconciliation method in terms of the amount of information transmitted on the classical channel. Such may limit the achievable key rates. For instance, multidimensional reconciliation of dimension 8 demands a classical channel bandwidth 43 times greater than that of the quantum channel baud rate. Decreasing the dimension to 4 halves the required bandwidth, allowing for higher quantum channel baud rates and higher key rates for shorter transmission distances, despite the lesser reconciliation performance. image

引用

页码：601 / 611

页数：11

共 33 条

[1]

Almeida Margarida, 2023, Proceedings of SPIE, DOI 10.1117/12.2683577

[2] Reconciliation Efficiency Impact on Discrete Modulated CV-QKD Systems Key Rates [J].