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  3. Realization Of High-reliable Coherent-state Quantum Secure Communication.
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  3. Realization Of High-reliable Coherent-state Quantum Secure Communication.

Related Experiment Video

Generation and Coherent Control of Pulsed Quantum Frequency Combs
06:42

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Published on: June 8, 2018

Realization of High-Reliable Coherent-State Quantum Secure Communication.

Xinlei Chen1, Geng Chai1, Lei Wang1

  • 1Laboratory of Quantum Information and Technology, School of Electronic Information, Northwest University, Xi'an 710127, China.

Research (Washington, D.C.)
|June 3, 2026

View abstract on PubMed

Summary
This summary is machine-generated.

This study establishes a high-capacity quantum secure communication system using Gaussian mapping and a one-time pad for secure encryption. The system demonstrates reliable data transmission over 10 km of optical fiber, achieving high secrecy capacity.

More Related Videos

Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators
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Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators

Published on: May 30, 2014

Related Experiment Videos

Generation and Coherent Control of Pulsed Quantum Frequency Combs
06:42

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Published on: June 8, 2018

Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators
09:23

Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators

Published on: May 30, 2014

Area of Science:

  • Quantum Information Science
  • Quantum Communication
  • Cryptography

Background:

  • Continuous-variable quantum secure communication (CV-QSC) using Gaussian mapping offers high capacity and transmission rates.
  • A one-time pad (OTP) encryption scheme provides theoretical security.
  • Wyner's wiretap channel theory is a standard for evaluating quantum communication security.

Purpose of the Study:

  • To establish and evaluate a reliable coherent-state CV-QSC system.
  • To develop an information reconstruction scheme for low-to-medium signal-to-noise ratios.
  • To design a self-balanced homodyne detector for improved performance.

Main Methods:

  • Implementation of a coherent-state CV-QSC system with Gaussian mapping.
  • Application of Wyner's wiretap channel theory for security evaluation.
  • Development of a multidimensional rotation-based information reconstruction scheme.
  • Design of a self-balanced homodyne detector with a programmable gain amplifier.

    • Main Results:

    • A system achieving a low electronic noise variance (1.624 × 10 - 7 V 2) and 715 MHz bandwidth.
    • Secure transmission of a dichroic image over 10-km optical fiber with a block error rate of 8.78 × 10 - 5.
    • Achieved a secrecy capacity of 2.44 × 10 5 bits per second.

    Conclusions:

    • The established coherent-state CV-QSC system is reliable and secure.
    • The proposed information reconstruction scheme enhances secret message extraction.
    • The developed homodyne detector improves system performance for practical applications.