Digital reconstruction of squeezed light
Researchers from CyberQ have published a new paper in npj Quantum Information titled "Digital reconstruction of squeezed light for quantum information processing"
Concept and approach
CyberQ follows three critical paths to establish quantum cryptographic security and accelerate industrial adoption.
Three critical paths
CyberQ is pushing the boundaries of continuous variable (CV) QKD systems by following three strategic paths. Path A focuses on strengthening the security foundations of CV QKD protocols to ensure robustness against increasingly sophisticated quantum attacks. Path B involves developing and optimizing QKD protocols that support complex, multi-user quantum networks, enabling scalable and flexible quantum-secure communications. Finally, Path C advances practical aspects such as device miniaturization, integration, and cost reduction, ensuring QKD technologies can be widely deployed and adopted across industries.
Secure Protocol
Networks
Cost reduction
Six objectives
CyberQ has defined six objectives to address critical challenges and drive significant progress toward the project's goals.
Develop and optimize two-mode squeezing sources for free-space and photonic integrated circuits, achieving a squeezing level of at least -6dB and -3dB, respectively.
Establish fully functioning MDI- and DI-QKD systems that cover a distance of at least 10 km.
Develop calibration and validation methodologies for squeezed light sources, and actively contribute to QKD standardization activities at an EU level.
Enable the integration of quantum keys from QKD systems into the video call desktop application, facilitating secure, encrypted video calls.
Demonstrate entanglement distribution over deployed fiber, showcase the co-propagation of squeezed QKD and data traffic, and execute real-time high-speed squeezed QKD demonstrations between DTU and DFM.
Detailing at least 3 commercial use-cases of the developed QKD technology, examining potential avenues such as QKD-as-a-service.
Eight work packages
CyberQ is structured into eight work packages, each led by a consortium partner with deep expertise in the relevant domain. WP1 provides overall project coordination and ensures synergy across the technical and dissemination activities. WP2 to WP5 concentrate on the core quantum technologies, developing key QKD components, advancing QKD protocols, and realizing practical QKD implementations. WP6 addresses certification, metrology, and standardization, ensuring that the systems meet future regulatory and commercial demands. WP7 is dedicated to establishing QKD network infrastructure and integrating quantum keys into secure communication software. WP8 explores use cases and conducts demonstrations, laying the groundwork for future exploitation.
Project Management (WP Lead: DTU-P)
QKD system components (WP Lead: DTU-E)
High-speed squeezed light QKD (WP Lead: DTU-P)
Measurement-device independent QKD (WP Lead: DTU-P)
Device-independent QKD (WP Lead: DTU-P)
Certification and standards (WP Lead: DFM)
QKD network infrastructure (WP Lead: DC)
Demonstrations and use-cases (WP Lead: GC)
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Project kick-off
The CyberQ consortium kicked off the project with engaging talks and discussions, setting the stage for a successful journey ahead.