Secret key rate of multi-ring M-APSK continuous variable quantum key distribution

被引：24

作者：

Almeida, Margarida ^{[1
,2
]}

Pereira, Daniel ^{[1
,3
]}

Muga, Nelson J. ^{[1
,4
]}

Facao, Margarida ^{[2
,5
]}

Pinto, Armando N. ^{[1
,3
]}

Silva, Nuno A. ^{[1
,4
]}

机构：

[1] Campus Univ Santiago, Inst Telecomunicacoes, P-3810193 Aveiro, Portugal

[2] Univ Aveiro, Dept Phys, Campus Univ Santiago, P-3810193 Aveiro, Portugal

[3] Univ Aveiro, Dept Elect Telecommun & Informat, Campus Univ Santiago, P-3810193 Aveiro, Portugal

[4] Univ Aveiro, Campus Univ Santiago, P-3810193 Aveiro, Portugal

[5] Univ Aveiro, Dept Phys, I3N, Campus Univ Santiago, P-3810193 Aveiro, Portugal

来源：

OPTICS EXPRESS | 2021年 / 29卷 / 23期

关键词：

Phase shift - Transmissions - Quantum cryptography - Delta modulation;

D O I：

10.1364/OE.439992

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Discrete modulation continuous variable quantum key distribution (DM-CV-QKD) is highly considered in real implementations to avoid the complexity of Gaussian modulation (GM), which is optimum in terms of the key rate. DM-CV-QKD systems usually consider M-symbol phase shift keying (M-PSK) constellations. However, this type of constellation cannot reach transmission distances and key rates as high as GM, limiting the practical implementation of CV-QKD systems. Here, by considering M-symbol amplitude and phase shift keying (M-APSK) constellations, we can approximate GM. Indeed, considering finite-size effects, 4 ring 64-APSK can reach 52.0 km, only 7.2 km less than GM and 282% the maximum achievable transmission distance for 8-PSK. (C) 2021 Optical Society of America under the terms of the OSA Open Access Publishing Agreement

引用

页码：38669 / 38682

页数：14

共 30 条

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