Discrete-modulation continuous-variable quantum key distribution enhanced by quantum scissors

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

doi:10.1109/JSAC.2020.2969058

Discrete-modulation continuous-variable quantum key distribution enhanced by quantum scissors

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

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

Abstract

It is known that quantum scissors, as non-deterministic amplifiers, can enhance the performance of Gaussian-modulated continuous-variable quantum key distribution (CV-QKD) in noisy and long-distance regimes of operation. Here, we extend this result to a {\em non-Gaussian} CV-QKD protocol with discrete modulation. We show that, by using a proper setting, the use of quantum scissors in the receiver of such discrete-modulation CV-QKD protocols would allow us to achieve positive secret key rates at high loss and high excess noise regimes of operation, which would have been otherwise impossible. This also keeps the prospect of running discrete-modulation CV-QKD over CV quantum repeaters alive.

Original language	English
Pages (from-to)	506-516
Number of pages	11
Journal	IEEE Journal on Selected Areas in Communication
Volume	38
Issue number	3
Early online date	23 Jan 2020
DOIs	https://doi.org/10.1109/JSAC.2020.2969058
Publication status	Published - Mar 2020

Bibliographical note

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

Access to Document

10.1109/JSAC.2020.2969058

1907.13405v1
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Submitted manuscript, 1.04 MB
Discrete_modulation_continuous_variable_quantum_key_distribution_enhanced_by_quantum_scissors__1_
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Accepted author manuscript, 1.18 MB

Cite this

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abstract = " It is known that quantum scissors, as non-deterministic amplifiers, can enhance the performance of Gaussian-modulated continuous-variable quantum key distribution (CV-QKD) in noisy and long-distance regimes of operation. Here, we extend this result to a {\em non-Gaussian} CV-QKD protocol with discrete modulation. We show that, by using a proper setting, the use of quantum scissors in the receiver of such discrete-modulation CV-QKD protocols would allow us to achieve positive secret key rates at high loss and high excess noise regimes of operation, which would have been otherwise impossible. This also keeps the prospect of running discrete-modulation CV-QKD over CV quantum repeaters alive. ",

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