Contributed Talks 2a: Experimental Talks

Tue, 3 Sep , 12:30 - 13:10

MadQCI: a heterogeneous and scalable SDN QKD network deployed in production facilities.
Vicente Martin (Universidad Politécnica de Madrid / Center for computational simulation); Juan Pedro Brito (Universidad Politécnica de Madrid / Center for computational simulation); Laura Ortiz (Universidad Politécnica de Madrid / Center for computational simulation); Ruben Brito-Mendez (Universidad Politécnica de Madrid / Center for computational simulation); Jaime Saez-Buruaga (Universidad Politécnica de Madrid / Center for computational simulation); Rafael J. Vicente (Universidad Politécnica de Madrid / Center for computational simulation); Alberto Sebastian-Lombraña (Universidad Politécnica de Madrid / Center for computational simulation); David Rincon (IMDEA SW Institute); Cesar Sanchez (IMDEA SW institute); Fernando Pérez (IMDEA SW Institute); Momtchil Peev (Munich Research Center, Huawei Technologies Duesseldorf GmbH, Munich, Germany); Fred Fung (Munich Research Center, Huawei Technologies Duesseldorf GmbH, Munich, Germany); Hans H. Brunner (Munich Research Center, Huawei Technologies Duesseldorf GmbH, Munich, Germany); Andreas Poppe (Nutshell Quantum-Safe GmbH, Vienna, Austria); Florian Frowis (Nutshell Quantum-Safe GmbH, Vienna, Austria); Andrew J. Shields (Toshiba Europe Ltd., Cambridge, UK); Robert L. Woodward (Toshiba Europe Ltd., Cambridge, UK); Helmut Griesser (Adva Network Security GmbH. Berlin, Germany); Stefan Roehrich (Rohde & Schwarz Cybersecurity GmbH, Germany); Fernando De La Iglesia (Quside, Barcelona, Spain); Carlos Abellán (Quside, Barcelona, Spain); Michael Hentschel (Austrian Institute of Technology, Vienna, Austria); Jose Manuel Rivas-Moscoso (Telefónica gCTIO/I+D, Madrid, Spain); Antonio Pastor-Perales (Telefónica gCTIO/I+D, Madrid, Spain); Jesus Folgueira (Telefónica gCTIO/I+D, Madrid, Spain); Diego López (Telefónica gCTIO/I+D, Madrid, Spain)
[abstract]
Abstract: Current quantum key distribution (QKD) networks focus almost exclusively on transporting secret keys with the highest possible rate. Consequently, they are built as mostly fixed, ad hoc, logically, and physically isolated infrastructures designed to avoid any penalty to the quantum channel. This architecture is neither scalable nor cost-effective and future, real-world deployments will differ considerably. The structure of the MadQCI QKD network presented here is based on disaggregated components and modern paradigms especially designed for flexibility, upgradability, and facilitating the integration of QKD in the security and telecommunications-networks ecosystem. These underlying ideas have been tested by deploying many QKD systems from several manufacturers in a real-world, multi-tenant telecommunications network, installed in production facilities and sharing the infrastructure with commercial traffic. Different technologies have been used in different links to address the variety of situations and needs that arise in real networks, exploring a wide range of possibilities. Finally, a set of realistic use cases have been implemented to demonstrate the validity and performance of the network. The testing took place during a period close to three years, where most of the nodes were continuously active.
merged with
The largest quantum network of Europe in a node: Norte in MadQCI
Alberto Sebastián-Lombraña (Universidad Politécnica de Madrid. Center for Computational Simulation); Juan Pedro Brito Mendez (Universidad Politécnica de Madrid); Rubén B. Méndez (Universidad Politécnica de Madrid. Center for Computational Simulation); Rafael J Vicente (Universidad Politécnica de Madrid. Center for Computational Simulation); Jaime S. Buruaga (Universidad Politécnica de Madrid. Center for Computational Simulation); Laura Ortiz (Universidad Politécnica de Madrid. Center for Computational Simulation); Vicente Martin-Ayuso (Universidad Politécnica de Madrid)
[abstract]
Abstract: During its fourth iteration, the Madrid Quantum Network (MadQCI) gathered up to 26 quantum key distribution (QKD) modules in 9 nodes connected by approximately 110 kilometres of fibre optic pairs. These nodes were part of two domains that had to be connected by an border link. It also hosted a co-located network testing a QKD-switched network. The deployment allowed quantum resources of different nature to be distributed and multiple use cases to be tested. This article details a single node in the network, called Norte, to exemplify the network deployment as a whole.
The Rio Quantum Network: towards a reconfigurable hybrid metropolitan QKD network
Guilherme Temporao (Pontifical Catholic University of Rio de Janeiro (PUC-Rio); Fernando Melo (Centro Brasileiro de Pesquisas Físicas); Antonio Khoury (Universidade Federal Fluminense)
[abstract]
Abstract: This work introduces a metropolitan quantum communication network connecting four research institutions in the state of Rio de Janeiro through installed dark optical fibers and a 7-km free space link. The Twin-Field Measurement Device Independent Quantum Key Distribution (TF-MDI-QKD) protocol is implemented to enable secure communication between any two network nodes independently, without the need for trusted nodes. The proposed structured - a "folded Sagnac" configuration - is shown to be able to not only automatically compensate for phase fluctuations but also circumvent unneeded losses by reconfiguring the Sagnac loop size as needed; moreover, by employing polarization control and a Faraday Mirror, the free-space link can be added to the loop without the need for additional telescopes. The first experimental results will be presented together with the main engineering challenges being tackled.