Loading [a11y]/accessibility-menu.js
BB84 decoy-state QKD protocol over long-distance optical fiber | IEEE Conference Publication | IEEE Xplore

BB84 decoy-state QKD protocol over long-distance optical fiber


Abstract:

Quantum key distribution represents one of the most mature and well-studied advances in quantum technologies. Many protocols have been implemented, breaking record distan...Show More

Abstract:

Quantum key distribution represents one of the most mature and well-studied advances in quantum technologies. Many protocols have been implemented, breaking record distances both employing satellites [1] and fiber-based systems [2]. However, there still are open challenges in achieving long-distance links without implementing quantum repeaters. One of the main limiting factors comes from the non-ideality of detection systems, in particular from intrinsic dark counts. As the covered distances increase, the signal decreases in intensity and the intrinsic noise in the detector prevails, hindering the extraction of a secret key. In this work, we propose the use of high-performance state-of-the-art superconducting nanowire single-photon detectors (SNSPD) showing ultra-low dark count rates to reduce the quantum bit error rate (QBER) in the detection system. Overall we achieved a link distance of 55 dB equivalent to 275 km in ultra low-loss fiber.
Date of Conference: 02-06 July 2023
Date Added to IEEE Xplore: 08 August 2023
ISBN Information:

ISSN Information:

Conference Location: Bucharest, Romania

Funding Agency:


References

References is not available for this document.