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Fading channel estimation for free-space continuous-variable secure quantum communication
- Source :
- New Journal of Physics
- Publication Year :
- 2020
-
Abstract
- We investigate estimation of fluctuating channels and its effect on security of continuous-variable quantum key distribution. We propose a novel estimation scheme which is based on the clusterization of the estimated transmittance data. We show that uncertainty about whether the transmittance is fixed or not results in a lower key rate. However, if the total number of measurements is large, one can obtain using our method a key rate similar to the non-fluctuating channel even for highly fluctuating channels. We also verify our theoretical assumptions using experimental data from an atmospheric quantum channel. Our method is therefore promising for secure quantum communication over strongly fluctuating turbulent atmospheric channels.<br />17 pages, 11 figures
- Subjects :
- Quantum Physics
Computer science
Turbulence
General Physics and Astronomy
FOS: Physical sciences
Quantum channel
Quantum key distribution
01 natural sciences
010305 fluids & plasmas
0103 physical sciences
Transmittance
Key (cryptography)
Fading
ddc:530
Statistical physics
010306 general physics
Quantum information science
Quantum Physics (quant-ph)
Communication channel
Computer Science::Information Theory
Subjects
Details
- Language :
- English
- ISSN :
- 13672630
- Database :
- OpenAIRE
- Journal :
- New Journal of Physics
- Accession number :
- edsair.doi.dedup.....a408c9edb6f3ce4881b18ca0750c95a0