High-speed continuous-variable quantum key distribution over atmospheric turbulent channels
Affiliation
Univ Arizona, Dept Elect & Comp EngnIssue Date
2017-02-20Keywords
Continuous-variable quantum key distribution (CV-QKD)atmospheric turbulence
discrete modulation
phase noise cancellation (PNC)
secret key rate (SKR)
Metadata
Show full item recordPublisher
SPIE-INT SOC OPTICAL ENGINEERINGCitation
Zhen Qu, Ivan B. Djordjevic, "High-speed continuous-variable quantum key distribution over atmospheric turbulent channels", Proc. SPIE 10118, Advances in Photonics of Quantum Computing, Memory, and Communication X, 101180B (20 February 2017); doi: 10.1117/12.2250213; http://dx.doi.org/10.1117/12.2250213Rights
© 2017 SPIE.Collection Information
This item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.Abstract
We experimentally demonstrate a RF-assisted four-state continuous-variable quantum key distribution (CV-QKD) system in the presence of turbulence. The atmospheric turbulence channel is emulated by two spatial light modulators (SLMs) on which two randomly generated azimuthal phase patterns are recorded yielding Andrews' azimuthal phase spectrum. Frequency and phase locking are not required in our system thanks to the proposed digital phase noise cancellation (PNC) stage. Besides, the transmittance fluctuation can be monitored accurately by the DC level in this PNC stage, which is free of post-processing noise. The mean excess noise is measured to be 0.014, and the maximum secret key rate of >20Mbit/s can be obtained with the transmittance of 0.85, while employing the commercial PIN photodetectors.ISSN
0277-786XEISSN
1996-756XVersion
Final published versionSponsors
Office of Naval Research (ONR) [N00014-13-1-0627]ae974a485f413a2113503eed53cd6c53
10.1117/12.2250213