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

Beatrice Da Lio; Daniele Cozzolino; Nicola Biagi; Yunhong Ding; Karsten Rottwitt; Alessandro Zavatta; Davide Bacco; Leif Katsuo Oxenløwe

doi:10.1038/s41534-021-00398-y

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

Beatrice Da Lio, Daniele Cozzolino, Nicola Biagi, Yunhong Ding, Karsten Rottwitt, Alessandro Zavatta, Davide Bacco^*, Leif Katsuo Oxenløwe

^*Corresponding author for this work

Centre of Excellence for Silicon Photonics for Optical Communications

Research output: Contribution to journal › Journal article › Research › peer-review

58 Downloads (Pure)

Abstract

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.

Original language	English
Article number	63
Journal	npj Quantum Information
Volume	7
Issue number	1
Number of pages	6
ISSN	2056-6387
DOIs	https://doi.org/10.1038/s41534-021-00398-y
Publication status	Published - Dec 2021

Bibliographical note

Funding Information:
The authors would like to thank D. Rusca for the fruitful discussion. This work is supported by the Center of Excellence, SPOC-Silicon Photonics for Optical Communications (ref DNRF123), by the EraNET Cofund Initiatives QuantERA within the European Union’s Horizon 2020 research and innovation program grant agreement No. 731473 (project SQUARE).

Publisher Copyright:
© 2021, The Author(s).

Access to Document

10.1038/s41534-021-00398-y

FulltextFinal published version, 1.49 MB

OpenUrl availability

Full text

Cite this

@article{f4c6a8a5fda2415f9a7e7270c11598dd,

title = "Path-encoded high-dimensional quantum communication over a 2-km multicore fiber",

abstract = "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.",

author = "{Da Lio}, Beatrice and Daniele Cozzolino and Nicola Biagi and Yunhong Ding and Karsten Rottwitt and Alessandro Zavatta and Davide Bacco and Oxenl{\o}we, {Leif Katsuo}",

note = "Funding Information: The authors would like to thank D. Rusca for the fruitful discussion. This work is supported by the Center of Excellence, SPOC-Silicon Photonics for Optical Communications (ref DNRF123), by the EraNET Cofund Initiatives QuantERA within the European Union{\textquoteright}s Horizon 2020 research and innovation program grant agreement No. 731473 (project SQUARE). Publisher Copyright: {\textcopyright} 2021, The Author(s).",

year = "2021",

month = dec,

doi = "10.1038/s41534-021-00398-y",

language = "English",

volume = "7",

journal = "npj Quantum Information",

issn = "2056-6387",

publisher = "Nature Publishing Group",

number = "1",

}

TY - JOUR

T1 - Path-encoded high-dimensional quantum communication over a 2-km multicore fiber

AU - Da Lio, Beatrice

AU - Cozzolino, Daniele

AU - Biagi, Nicola

AU - Ding, Yunhong

AU - Rottwitt, Karsten

AU - Zavatta, Alessandro

AU - Bacco, Davide

AU - Oxenløwe, Leif Katsuo

N1 - Funding Information: The authors would like to thank D. Rusca for the fruitful discussion. This work is supported by the Center of Excellence, SPOC-Silicon Photonics for Optical Communications (ref DNRF123), by the EraNET Cofund Initiatives QuantERA within the European Union’s Horizon 2020 research and innovation program grant agreement No. 731473 (project SQUARE). Publisher Copyright: © 2021, The Author(s).

PY - 2021/12

Y1 - 2021/12

N2 - 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.

AB - 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.

U2 - 10.1038/s41534-021-00398-y

DO - 10.1038/s41534-021-00398-y

M3 - Journal article

AN - SCOPUS:85104713901

SN - 2056-6387

VL - 7

JO - npj Quantum Information

JF - npj Quantum Information

IS - 1

M1 - 63

ER -

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

Abstract

Bibliographical note

Access to Document

OpenUrl availability

Fingerprint

Cite this