Long-Distance Continuous-Variable Quantum Key Distribution over 202.81 km of Fiber

Physical Review Letters
Yichen ZhangHong Guo

Abstract

Quantum key distribution provides secure keys resistant to code-breaking quantum computers. The continuous-variable version of quantum key distribution offers the advantages of higher secret key rates in metropolitan areas, as well as the use of standard telecom components that can operate at room temperature. However, the transmission distance of these systems (compared with discrete-variable systems) are currently limited and considered unsuitable for long-distance distribution. Herein, we report the experimental results of long distance continuous-variable quantum key distribution over 202.81 km of ultralow-loss optical fiber by suitably controlling the excess noise and employing highly efficient reconciliation procedures. This record-breaking implementation of the continuous-variable quantum key distribution doubles the previous distance record and shows the road for long-distance and large-scale secure quantum key distribution using room-temperature standard telecom components.

References

Aug 5, 1991·Physical Review Letters·A K Ekert
Feb 28, 2002·Physical Review Letters·Frédéric Grosshans, Philippe Grangier
Jan 17, 2003·Nature·Frédéric GrosshansPhilippe Grangier
Nov 5, 2004·Physical Review Letters·Christian WeedbrookPing Koy Lam
Dec 13, 2006·Physical Review Letters·Miguel NavascuésAntonio Acín
Dec 13, 2006·Physical Review Letters·Raúl García-Patrón, Nicolas J Cerf
Apr 28, 2009·Physical Review Letters·Raúl García-Patrón, Nicolas J Cerf
Jul 21, 2015·Optics Express·Duan HuangGuihua Zeng
Apr 27, 2017·Nature Communications·Stefano PirandolaLeonardo Banchi
Nov 24, 2018·Physical Review Letters·Alberto BoaronHugo Zbinden

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