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Related Experiment Video

Updated: Jun 17, 2026

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Published on: June 8, 2018

A 24 km fiber-based discretely signaled continuous variable quantum key distribution system.

Quyen Dinh Xuan¹, Zheshen Zhang, Paul L Voss

¹Georgia Tech Lorraine, Georgia Tech-C.N.R.S., UMI 2958, 2-3 rue Marconi, Metz, France.

|January 7, 2010

Summary

This summary is machine-generated.

We developed a continuous variable quantum key distribution system. It achieved a secure key rate of 3.45 kilobits/s over 24.2 km of optical fiber, enhancing secure communication.

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Quasi-light Storage for Optical Data Packets

Quasi-light Storage for Optical Data Packets

Published on: February 6, 2014

Area of Science:

Quantum Information Science
Quantum Cryptography
Optical Communications

Background:

Continuous variable quantum key distribution (CV-QKD) is a promising method for secure communication.
Achieving high secure key rates over long distances remains a challenge.

Purpose of the Study:

To report a novel CV-QKD system with enhanced performance.
To demonstrate secure key generation over a significant fiber optic distance.

Main Methods:

Utilized discrete signaling and post-selection for improved reconciliation speed.
Employed polarization multiplexing and frequency translation for efficient signal transmission.
Quantified security using quantum state tomography.
Suppressed noise from guided acoustic wave Brillouin scattering by over 27 dB.

Main Results:

Achieved a final secure key rate of 3.45 kilobits/s.
Demonstrated operation over a distance of 24.2 km of optical fiber.
Successfully transmitted a continuous wave local oscillator.

Conclusions:

The developed CV-QKD system offers a practical approach to high-speed, long-distance secure key distribution.
The implemented techniques effectively enhance performance and security in fiber-based quantum communication.