High-speed continuous-variable quantum key distribution over atmospheric turbulent channels
AffiliationUniv Arizona, Dept Elect & Comp Engn
KeywordsContinuous-variable quantum key distribution (CV-QKD)
phase noise cancellation (PNC)
secret key rate (SKR)
MetadataShow full item record
PublisherSPIE-INT SOC OPTICAL ENGINEERING
CitationZhen 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/10.1117/12.2250213
Rights© (2017) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE).
Collection InformationThis 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 email@example.com.
AbstractWe 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.
VersionFinal published version
SponsorsOffice of Naval Research (ONR) [N00014-13-1-0627]