A multinational European deep-tech consortium named QUARTERNEXT has launched a four-year, cross-border initiative to mature and formally certify quantum-safe communication infrastructures. Coordinated by Spanish cybersecurity hardware developer Luxquanta, the project establishes a 48-month deployment pipeline that spans specialized entities across Spain, Austria, and the Netherlands. Funded under the Digital Europe Programme’s IRIS² Quantum Communication Infrastructure (QCI) framework, the partnership develops certified, industrial-grade systems to directly support the European Union’s broader EuroQCI mandate—an initiative focused on interconnecting member states via highly secure, tamper-evident communication networks.
[ QUARTERNEXT Consortium Architecture ]
Coordinator ──► Luxquanta (Spain) — Managing full CV-QKD structural compliance.
Core Technical SMEs ──► Quside (Spain), Chilas (Netherlands), and fragmentiX (Austria).
Infrastructure Links──► Telefónica (Telecom Network Carrier) & AIT (Research & Software Lead).
Operational Mandate ──► Integration and formal certification of EU-made quantum hardware blocks.
The technological roadmap targets the miniaturization, deployment, and standardization of Continuous-Variable Quantum Key Distribution (CV-QKD) systems. While earlier research networks successfully verified primitive quantum key exchanges, translating these frameworks into critical infrastructure requires strict regulatory compliance and the ability to operate over existing classical fiber optics without signal degradation. To minimize installation overhead for commercial telecommunications carriers, QUARTERNEXT is designing advanced coexistence frameworks that partition light frequencies, allowing fragile quantum data channels and heavy classical streams to run concurrently over the same physical optical fibers.
The collective engineering execution integrates specialized hardware and software components from each partner:
- Luxquanta: Drives the core optimization of CV-QKD cryptographic protocols to compile a standardized system ready for deployment in EuroQCI layouts.
- Quside: Refines and scales its high-speed Quantum Random Number Generator (QRNG) chips to generate the raw entropy required for cryptographic key initialization. Chilas Lasers
- Chilas: Modifies and ruggedizes its narrow-linewidth, tunable integrated photonic lasers to serve as the highly stable optical engines within the quantum transceiver nodes. Chilas Lasers
- fragmentiX: engineers certified, high-data-rate secret-sharing appliances that exploit quantum randomness to protect stored data using information-theoretic security. Chilas Lasers
- Telefónica: Oversees the integration of software-defined networking layers and conducts live multi-vendor interoperability tests inside its operational TEFQCI production environment. Chilas Lasers
- Austrian Institute of Technology (AIT): Advances the centralized Key Management System (KMS) and Software-Defined Network (SDN) suites while executing vulnerability assessments and security penetration tests. Chilas Lasers
To secure final European market deployment, the consortium will feed its hardware and software prototypes directly into Nostradamus—the EU’s designated infrastructure for testing, evaluation, and certification of quantum-safe systems. This collaborative vetting pipeline acts as a bridge to establish a unified European security standard. Furthermore, by anchoring its manufacturing and design loops within regional ecosystems like PIXEurope (the EU’s €400M photonic integrated circuit pilot line), QUARTERNEXT aims to solidify European technological sovereignty and build a resilient, domestic supply chain for high-security semiconductor and communication components.
The official deployment parameters, consortium partner milestone descriptions, and regional cybersecurity goals can be reviewed here, while the underlying physical component blueprints and laser tuning models can be verified here.
July 8, 2026
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