Path-encoded high-dimensional quantum communication over a 2-km multicore fiber

被引：43

作者：

Da Lio, Beatrice ^{[1
]}

Cozzolino, Daniele ^{[1
]}

Biagi, Nicola ^{[2
]}

Ding, Yunhong ^{[1
]}

Rottwitt, Karsten ^{[1
]}

Zavatta, Alessandro ^{[2
,3
,4
]}

Bacco, Davide ^{[1
]}

Oxenlowe, Leif K. ^{[1
]}

机构：

[1] Tech Univ Denmark, Dept Photon Engn, Ctr Silicon Photon Opt Commun SPOC, Lyngby, Denmark

[2] CNR Ist Nazl Ott CNR INO, Florence, Italy

[3] Univ Firenze, LENS, Sesto Fiorentino, Italy

[4] Univ Firenze, Dipartimento Fis & Astron, Sesto Fiorentino, Italy

来源：

NPJ QUANTUM INFORMATION | 2021年 / 7卷 / 01期

基金：

欧盟地平线“2020”;

关键词：

KEY DISTRIBUTION; ENTANGLEMENT; STATES;

D O I：

10.1038/s41534-021-00398-y

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Quantum key distribution (QKD) protocols based on high-dimensional quantum states have shown the route to increase the key rate generation while benefiting of enhanced error tolerance, thus overcoming the limitations of two-dimensional QKD protocols. Nonetheless, the reliable transmission through fiber links of high-dimensional quantum states remains an open challenge that must be addressed to boost their application. Here, we demonstrate the reliable transmission over a 2-km-long multicore fiber of path-encoded high-dimensional quantum states. Leveraging on a phase-locked loop system, a stable interferometric detection is guaranteed, allowing for low error rates and the generation of 6.3 Mbit/s of a secret key rate.

引用

页数：6

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