Passively stable distribution of polarisation entanglement over 192 km of deployed optical fibre

Sören Wengerowsky; Siddarth Koduru Joshi; Fabian Steinlechner; Julien R. Zichi; Bo Liu; Thomas Scheidl; Sergiy M. Dobrovolskiy; René van der Molen; Johannes W.N. Los; Val Zwiller; Marijn A.M. Versteegh; Alberto Mura; Davide Calonico; Massimo Inguscio; Anton Zeilinger; André Xuereb; Rupert Ursin

doi:10.1038/s41534-019-0238-8

Passively stable distribution of polarisation entanglement over 192 km of deployed optical fibre

Sören Wengerowsky^*, Siddarth Koduru Joshi, Fabian Steinlechner, Julien R. Zichi, Bo Liu, Thomas Scheidl, Sergiy M. Dobrovolskiy, René van der Molen, Johannes W.N. Los, Val Zwiller, Marijn A.M. Versteegh, Alberto Mura, Davide Calonico, Massimo Inguscio, Anton Zeilinger, André Xuereb, Rupert Ursin

^*Corresponding author for this work

Research output: Contribution to journal › Article (Academic Journal) › peer-review

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Abstract

Quantum key distribution (QKD) based on entangled photon pairs holds the potential for repeater-based quantum networks connecting clients over long distance. We demonstrate long-distance entanglement distribution by means of polarisation-entangled photon pairs through two successive deployed 96 km-long telecommunications fibres in the same submarine cable. One photon of each pair was detected directly after the source, while the other travelled the fibre cable in both directions for a total distance of 192 km and attenuation of 48 dB. The observed two-photon Bell state exhibited a fidelity 85 ± 2% and was stable over several hours. We employed neither active stabilisation of the quantum state nor chromatic dispersion compensation for the fibre.

Original language	English
Article number	5 (2020)
Number of pages	5
Journal	npj Quantum Information
Volume	6
Issue number	1
DOIs	https://doi.org/10.1038/s41534-019-0238-8
Publication status	Published - 11 Jan 2020

Research Groups and Themes

Bristol Quantum Information Institute
QETLabs
Photonics and Quantum

Keywords

Single photons and quantum effects
Quantum information

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10.1038/s41534-019-0238-8

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Wengerowsky, S., Joshi, S. K., Steinlechner, F., Zichi, J. R., Liu, B., Scheidl, T., Dobrovolskiy, S. M., Molen, R. V. D., Los, J. W. N., Zwiller, V., Versteegh, M. A. M., Mura, A., Calonico, D., Inguscio, M., Zeilinger, A., Xuereb, A., & Ursin, R. (2020). Passively stable distribution of polarisation entanglement over 192 km of deployed optical fibre. npj Quantum Information, 6(1), Article 5 (2020). https://doi.org/10.1038/s41534-019-0238-8

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title = "Passively stable distribution of polarisation entanglement over 192 km of deployed optical fibre",

abstract = "Quantum key distribution (QKD) based on entangled photon pairs holds the potential for repeater-based quantum networks connecting clients over long distance. We demonstrate long-distance entanglement distribution by means of polarisation-entangled photon pairs through two successive deployed 96 km-long telecommunications fibres in the same submarine cable. One photon of each pair was detected directly after the source, while the other travelled the fibre cable in both directions for a total distance of 192 km and attenuation of 48 dB. The observed two-photon Bell state exhibited a fidelity 85 ± 2% and was stable over several hours. We employed neither active stabilisation of the quantum state nor chromatic dispersion compensation for the fibre.",

keywords = "Single photons and quantum effects, Quantum information",

author = "S{\"o}ren Wengerowsky and Joshi, {Siddarth Koduru} and Fabian Steinlechner and Zichi, {Julien R.} and Bo Liu and Thomas Scheidl and Dobrovolskiy, {Sergiy M.} and Molen, {Ren{\'e} van der} and Los, {Johannes W.N.} and Val Zwiller and Versteegh, {Marijn A.M.} and Alberto Mura and Davide Calonico and Massimo Inguscio and Anton Zeilinger and Andr{\'e} Xuereb and Rupert Ursin",

year = "2020",

month = jan,

day = "11",

doi = "10.1038/s41534-019-0238-8",

language = "English",

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Wengerowsky, S, Joshi, SK, Steinlechner, F, Zichi, JR, Liu, B, Scheidl, T, Dobrovolskiy, SM, Molen, RVD, Los, JWN, Zwiller, V, Versteegh, MAM, Mura, A, Calonico, D, Inguscio, M, Zeilinger, A, Xuereb, A & Ursin, R 2020, 'Passively stable distribution of polarisation entanglement over 192 km of deployed optical fibre', npj Quantum Information, vol. 6, no. 1, 5 (2020). https://doi.org/10.1038/s41534-019-0238-8

TY - JOUR

T1 - Passively stable distribution of polarisation entanglement over 192 km of deployed optical fibre

AU - Wengerowsky, Sören

AU - Joshi, Siddarth Koduru

AU - Steinlechner, Fabian

AU - Zichi, Julien R.

AU - Liu, Bo

AU - Scheidl, Thomas

AU - Dobrovolskiy, Sergiy M.

AU - Molen, René van der

AU - Los, Johannes W.N.

AU - Zwiller, Val

AU - Versteegh, Marijn A.M.

AU - Mura, Alberto

AU - Calonico, Davide

AU - Inguscio, Massimo

AU - Zeilinger, Anton

AU - Xuereb, André

AU - Ursin, Rupert

PY - 2020/1/11

Y1 - 2020/1/11

N2 - Quantum key distribution (QKD) based on entangled photon pairs holds the potential for repeater-based quantum networks connecting clients over long distance. We demonstrate long-distance entanglement distribution by means of polarisation-entangled photon pairs through two successive deployed 96 km-long telecommunications fibres in the same submarine cable. One photon of each pair was detected directly after the source, while the other travelled the fibre cable in both directions for a total distance of 192 km and attenuation of 48 dB. The observed two-photon Bell state exhibited a fidelity 85 ± 2% and was stable over several hours. We employed neither active stabilisation of the quantum state nor chromatic dispersion compensation for the fibre.

AB - Quantum key distribution (QKD) based on entangled photon pairs holds the potential for repeater-based quantum networks connecting clients over long distance. We demonstrate long-distance entanglement distribution by means of polarisation-entangled photon pairs through two successive deployed 96 km-long telecommunications fibres in the same submarine cable. One photon of each pair was detected directly after the source, while the other travelled the fibre cable in both directions for a total distance of 192 km and attenuation of 48 dB. The observed two-photon Bell state exhibited a fidelity 85 ± 2% and was stable over several hours. We employed neither active stabilisation of the quantum state nor chromatic dispersion compensation for the fibre.

KW - Single photons and quantum effects

KW - Quantum information

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U2 - 10.1038/s41534-019-0238-8

DO - 10.1038/s41534-019-0238-8

M3 - Article (Academic Journal)

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SN - 2056-6387

VL - 6

JO - npj Quantum Information

JF - npj Quantum Information

IS - 1

M1 - 5 (2020)

ER -

Passively stable distribution of polarisation entanglement over 192 km of deployed optical fibre

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