High-speed continuous-variable quantum key distribution over atmospheric turbulent channels

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

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.

Original languageEnglish (US)
Title of host publicationAdvances in Photonics of Quantum Computing, Memory, and Communication X
PublisherSPIE
Volume10118
ISBN (Electronic)9781510606777
DOIs
Publication statusPublished - 2017
EventAdvances in Photonics of Quantum Computing, Memory, and Communication X 2017 - San Francisco, United States
Duration: Jan 31 2017Feb 2 2017

Other

OtherAdvances in Photonics of Quantum Computing, Memory, and Communication X 2017
CountryUnited States
CitySan Francisco
Period1/31/172/2/17

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Keywords

  • Atmospheric turbulence
  • Continuous-variable quantum key distribution (CV-QKD)
  • Discrete modulation
  • Phase noise cancellation (PNC)
  • Secret key rate (SKR)

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

Cite this

Qu, Z., & Djordjevic, I. B. (2017). High-speed continuous-variable quantum key distribution over atmospheric turbulent channels. In Advances in Photonics of Quantum Computing, Memory, and Communication X (Vol. 10118). [101180B] SPIE. https://doi.org/10.1117/12.2250213