Long-distance continuous-variable quantum key distribution with quantum scissors

Masoud Ghalaii; Carlo Ottaviani; Rupesh Kumar; Stefano Pirandola; Mohsen Razavi

doi:10.1109/JSTQE.2020.2964395

Long-distance continuous-variable quantum key distribution with quantum scissors

Masoud Ghalaii, Carlo Ottaviani, Rupesh Kumar, Stefano Pirandola, Mohsen Razavi

Research output: Contribution to journal › Article › peer-review

Abstract

The use of quantum scissors, as candidates for non-deterministic amplifiers, in continuous-variable quantum key distribution systems is investigated. Such devices rely on single-photon sources for their operation and as such, they do not necessarily preserve the Guassianity of the channel. Using exact analytical modeling for system components, we bound the secret key generation rate for the system that uses quantum scissors. We find that for non-zero values of excess noise such a system can reach longer distances than the system with no amplification. The prospect of using quantum scissors in continuous-variable quantum repeaters is therefore emboldened.

Original language	English
Article number	6400212
Number of pages	13
Journal	IEEE Journal of Selected Topics in Quantum Electronics
Volume	26
Issue number	3
Early online date	8 Jan 2020
DOIs	https://doi.org/10.1109/JSTQE.2020.2964395
Publication status	E-pub ahead of print - 8 Jan 2020

Bibliographical note

(c) 2019 IEEE. This is an author-produced version of the published paper. Uploaded in accordance with the publisher’s self-archiving policy. Further copying may not be permitted; contact the publisher for details.

Keywords

quant-ph

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10.1109/JSTQE.2020.2964395

Long_distance_continuous_variable_quantum_key_distribution_with_quantum_scissors
(c) 2019 IEEE. This is an author-produced version of the published paper. Uploaded in accordance with the publisher’s self-archiving policy. Further copying may not be permitted; contact the publisher for details.
Accepted author manuscript, 1.75 MB
1808.01617v1

https://arxiv.org/pdf/1808.01617.pdf

UK Quantum Technology Hub for Quantum Communications Technologies
Spiller, T. P. (Principal investigator), Braunstein, S. L. (Co-investigator), Colbeck, R. (Co-investigator), Pirandola, S. (Co-investigator), Ottaviani, C. (Researcher), Parapatil Subramanian, R. K. (Researcher) & Ragy, S. H. (Researcher)
EPSRC
1/12/14 → 30/11/19
Project: Research project (funded) › Research

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Long-distance continuous-variable quantum key distribution with quantum scissors

Abstract

Bibliographical note

Keywords

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Projects

UK Quantum Technology Hub for Quantum Communications Technologies

Cite this