A 24 km fiber-based discretely signaled continuous variable quantum key distribution system
Related Experiment Video
Updated: Jun 17, 2026

Generation and Coherent Control of Pulsed Quantum Frequency Combs
Published on: June 8, 2018
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.
Abstract:
We report a continuous variable key distribution system that achieves a final secure key rate of 3.45 kilobits/s over a distance of 24.2 km of optical fiber. The protocol uses discrete signaling and post-selection to improve reconciliation speed and quantifies security by means of quantum state tomography. Polarization multiplexing and a frequency translation scheme permit transmission of a continuous wave local oscillator and suppression of noise from guided acoustic wave Brillouin scattering by more than 27 dB.
Related Concept Videos
Electronic Distance Measuring Instruments
Energy Stored In A Coaxial Cable
In the simplest form, a coaxial cable can be represented by two long hollow concentric cylinders in which the current flows in opposite directions. The magnetic field inside and outside the coaxial cable is determined by using Ampère's law. The magnetic field inside...
Discrete Fourier Transform
Discrete-time Fourier transform
One of the notable...
Design Example
Continuous -time Fourier Transform
