Resource-effective Quantum Key Distribution: a field-trial in Padua city center

• URL: http://arxiv.org/abs/2012.08457v1
• Date: Tue, 15 Dec 2020 17:54:29 GMT
• Title: Resource-effective Quantum Key Distribution: a field-trial in Padua city center
• Authors: Marco Avesani, Luca Calderaro, Giulio Foletto, Costantino Agnesi, Francesco Picciariello, Francesco Santagiustina, Alessia Scriminich, Andrea Stanco, Francesco Vedovato, Mujtaba Zahidy, Giuseppe Vallone and Paolo Villoresi
• Abstract summary: Quantum Key Distribution (QKD) allows distant parties to distill a secret key with unconditional security. We present a field-trial which exploits a low-complexity self-stabilized hardware and a novel synchronization technique.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Field-trials are of key importance for novel technologies seeking commercialization and wide-spread adoption. This is certainly also the case for Quantum Key Distribution (QKD), which allows distant parties to distill a secret key with unconditional security. Typically, QKD demonstrations over urban infrastructures require complex stabilization and synchronization systems to maintain a low Quantum Bit Error (QBER) and high secret key rates over time. Here we present a field-trial which exploits a low-complexity self-stabilized hardware and a novel synchronization technique, to perform QKD over optical fibers deployed in the city center of Padua, Italy. In particular, two techniques recently introduced by our research group are evaluated in a real-world environment: the iPOGNAC polarization encoder was used for the preparation of the quantum states, while the temporal synchronization was performed using the Qubit4Sync algorithm. The results here presented demonstrate the validity and robustness of our resource-effective QKD system, that can be easily and rapidly installed in an existing telecommunication infrastructure, thus representing an important step towards mature, efficient and low-cost QKD systems.

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