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Secret key rates of free-space optical continuous-variable quantum key distribution

Secret key rates of free-space optical continuous-variable quantum key distribution
Secret key rates of free-space optical continuous-variable quantum key distribution

In this letter, we derive the maximal achievable secret key rates for continuous-variable quantum key distribution (CVQKD) over free-space optical (FSO) quantum channels. We provide a channel decomposition for FSO-CVQKD quantum channels and study the SNR (signal-to-noise ratio) characteristics. The analytical derivations focus particularly on the low-SNR scenarios. The results are convenient for wireless quantum key distribution and for the quantum Internet.

cryptography, networking, quantum cryptography, quantum key distribution, security
1074-5351
Gyongyosi, Laszlo
bbfffd90-dfa2-4a08-b5f9-98376b8d6803
Imre, Sandor
2def242c-1cb7-4b12-8a16-351a5a36e041
Gyongyosi, Laszlo
bbfffd90-dfa2-4a08-b5f9-98376b8d6803
Imre, Sandor
2def242c-1cb7-4b12-8a16-351a5a36e041

Gyongyosi, Laszlo and Imre, Sandor (2019) Secret key rates of free-space optical continuous-variable quantum key distribution. International Journal of Communication Systems, [e4152]. (doi:10.1002/dac.4152).

Record type: Article

Abstract

In this letter, we derive the maximal achievable secret key rates for continuous-variable quantum key distribution (CVQKD) over free-space optical (FSO) quantum channels. We provide a channel decomposition for FSO-CVQKD quantum channels and study the SNR (signal-to-noise ratio) characteristics. The analytical derivations focus particularly on the low-SNR scenarios. The results are convenient for wireless quantum key distribution and for the quantum Internet.

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More information

Accepted/In Press date: 31 July 2019
e-pub ahead of print date: 28 August 2019
Keywords: cryptography, networking, quantum cryptography, quantum key distribution, security

Identifiers

Local EPrints ID: 434268
URI: http://eprints.soton.ac.uk/id/eprint/434268
ISSN: 1074-5351
PURE UUID: 6e486baf-438b-476e-8edb-df91a259188c

Catalogue record

Date deposited: 18 Sep 2019 16:30
Last modified: 16 Dec 2019 17:32

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Contributors

Author: Laszlo Gyongyosi
Author: Sandor Imre

University divisions

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