Quantum Key Distribution over 100 km underwater optical fiber assisted
by a Fast-Gated Single-Photon Detector
- URL: http://arxiv.org/abs/2303.01449v1
- Date: Thu, 2 Mar 2023 18:07:31 GMT
- Title: Quantum Key Distribution over 100 km underwater optical fiber assisted
by a Fast-Gated Single-Photon Detector
- Authors: Domenico Ribezzo, Mujtaba Zahidy, Gianmarco Lemmi, Antoine Petitjean,
Claudia De Lazzari, Ilaria Vagniluca, Enrico Conca, Alberto Tosi, Tommaso
Occhipinti, Leif K. Oxenl{\o}we, Andr\`e Xuereb, Davide Bacco and Alessandro
Zavatta
- Abstract summary: In this work, we implement a quantum key distribution link between Sicily (Italy) and Malta.
The performances of a standard commercial SPAD have been compared with the results achieved with a new prototype of fast-gated System in a Package (SiP) SPAD.
The SiP detector has shown to be able to accomplish a fourteen times higher key rate compared with the commercial device over the channel showing 20 dB of losses.
- Score: 44.07851469168589
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: Nowadays Quantum Key Distribution represents the most mature quantum
technology, and multiple countries as well as private institutions are building
their quantum network. However, QKD devices are still far from representing a
product within everyone's reach. Indeed, limitations in terms of compatibility
with existing telecom infrastructure and limited performances in terms of
secret key rate, using non-cryogenic detection systems, are still critical. In
this work, we implemented a quantum key distribution link between Sicily
(Italy) and Malta utilizing two different Single-Photon Avalanche Diode (SPAD)
detectors. The performances of a standard commercial SPAD have been compared
with the results achieved with a new prototype of fast-gated System in a
Package (SiP) SPAD; the SiP detector has shown to be able to accomplish a
fourteen times higher key rate compared with the commercial device over the
channel showing 20 dB of losses.
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