Qurope · Project

Hack-Proof Communication Networks Built on Quantum Light Sources

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Imagine sending a secret message that physically cannot be intercepted — if anyone tries to eavesdrop, the message self-destructs. Qurope built the hardware to make this work over long distances by creating tiny light sources (quantum dots) that produce perfectly paired photons, plus special "memory units" that can hold these photons until the next relay station is ready. Think of it like building signal boosters for a quantum internet, where each booster keeps the message perfectly secret as it hops from city to city.

By the numbers

consortium partners collaborating on quantum repeater development

countries represented in the research consortium

industry partners involved in device development

total project deliverables produced

demonstrated hardware deliverables including QKD, quantum memory, and quantum dot devices

The business problem

What needed solving

Current encryption methods face a ticking clock — future quantum computers will be able to break the mathematical algorithms that protect virtually all digital communication today. Quantum key distribution offers physics-based security that no computer can crack, but today's QKD systems only work over short distances because quantum signals degrade in fiber and cannot be amplified like classical signals. Businesses that handle sensitive data — banking, defense, telecom — need a way to extend quantum-secure communication across entire networks, not just single links.

The solution

What was built

The project built and demonstrated four key hardware components: optimized telecom-wavelength quantum dot devices that generate entangled photon pairs on demand, near-infrared quantum dot devices, a telecom quantum memory that can store and retrieve entangled photons, and a working quantum key distribution system using entanglement swapping — the core operation that chains quantum links together across longer distances.

Audience

Who needs this

Telecom operators building quantum-secure backbone infrastructureBanks and financial exchanges protecting high-value transaction dataDefense contractors developing classified communication systemsCloud providers offering quantum-safe encryption servicesNational cybersecurity agencies implementing sovereign quantum networks

Business applications

Who can put this to work

Telecommunications

enterprise

Target: Telecom operators and network infrastructure providers

If you are a telecom operator preparing your network for the quantum era — this project developed telecom-wavelength quantum dot devices and quantum memories specifically designed to work with existing fiber infrastructure. The consortium tested quantum key distribution through entanglement swapping, which is the core operation needed to extend secure quantum links beyond single-hop distances. With 10 partners across 7 countries validating the approach, this gives you a concrete technology path for quantum-secure backbone networks.

Financial Services & Banking

enterprise

Target: Banks and financial institutions with high-security data transfer needs

If you are a financial institution worried about future quantum computers breaking your encryption — this project built and tested quantum key distribution hardware that generates encryption keys guaranteed by physics, not math. The team demonstrated QKD after entanglement swapping, meaning keys can be distributed across multiple network nodes. This is exactly the building block needed to protect interbank transfers and trading data against both current and future cyber threats.

Defense & Government Security

enterprise

Target: Government agencies and defense contractors handling classified communications

If you are a defense contractor or government agency that needs communications immune to any computational attack — this project delivered working near-infrared and telecom quantum dot devices plus quantum memories that together form a quantum repeater. The consortium tested these in both free-space and fiber-based configurations, covering satellite-to-ground and underground cable scenarios. With 7 universities providing the science and 2 industry partners ensuring manufacturability, this is a credible path to field-deployable quantum-secure links.

Frequently asked

Quick answers

What would it cost to integrate this quantum technology into our existing network?

Based on available project data, specific cost figures are not disclosed. The technology is still at the research-to-prototype stage, so commercial pricing is not yet established. However, the project specifically designed its quantum dot devices for telecom wavelengths, meaning it targets compatibility with existing fiber infrastructure rather than requiring entirely new networks.

Can this scale to cover real-world communication distances?

The project explicitly aimed to solve the distance problem in quantum communication — that is what quantum repeaters do. The consortium tested both free-space and fiber-based quantum key distribution and demonstrated entanglement swapping, which is the key operation for extending range. However, large-scale deployment across hundreds of kilometers would still require further engineering beyond this project's scope.

What is the intellectual property situation — can we license this?

The consortium includes 7 universities and 2 industry partners across 7 countries. IP from EU-funded RIA projects typically stays with the partners who generated it, with licensing possible through individual agreements. Contact the coordinator at Universität Paderborn (Germany) as the starting point for licensing discussions.

How does this compare to other quantum communication approaches like QKD from existing vendors?

Current commercial QKD systems are limited to point-to-point links of roughly 100 km. Qurope's quantum repeater approach — using on-demand entangled photon sources paired with quantum memories — is designed to break this distance barrier. The 4 demonstrated deliverables (QKD after swapping, telecom and NIR quantum dot devices, telecom quantum memory) represent components that existing vendors do not yet offer as integrated systems.

When could this realistically be deployed in production?

The project ran from 2020 to 2024 and delivered working prototype devices and demonstrated QKD after entanglement swapping. Based on the research nature of the project (RIA funding scheme), production deployment would likely require an additional development and industrialization phase. A realistic timeline for early commercial quantum repeater products would be several years out.

Are there regulatory requirements we should know about?

Quantum key distribution systems fall under telecom regulations and, for government use, national security certification requirements (e.g., Common Criteria, national crypto approval). The EU is actively developing its EuroQCI quantum communication infrastructure initiative, which will shape the regulatory and procurement landscape. Early engagement positions you ahead of compliance requirements.

Consortium

Who built it

The Qurope consortium brings together 10 partners from 7 countries (Austria, Germany, Italy, Netherlands, Sweden, UK, and US), led by Universität Paderborn in Germany. The partnership is heavily academic with 7 universities, which is typical for deep-tech quantum research at this stage. The 2 industry partners (both SMEs) represent a 20% industry ratio — enough to ensure some commercial perspective, though the balance clearly favors research over near-term product development. The international spread across both EU and non-EU countries (UK, US) gives the project access to leading quantum research groups worldwide, which strengthens the science but means IP and commercialization paths may be more complex to navigate.

UNIVERSITAET PADERBORNCoordinator · DE
THE RESEARCH FOUNDATION OF STATE UNIVERSITY OF NEW YORKinternationalpartner · US
KUNGLIGA TEKNISKA HOEGSKOLANparticipant · SE
IMPERIAL COLLEGE OF SCIENCE TECHNOLOGY AND MEDICINEparticipant · UK
UNIVERSITAT LINZparticipant · AT
SINGLE QUANTUM BVparticipant · NL
HERIOT-WATT UNIVERSITYparticipant · UK
UNIVERSITY OF STUTTGARTparticipant · DE
UNIVERSITA DEGLI STUDI DI ROMA LA SAPIENZAparticipant · IT

How to reach the team

Universität Paderborn (Germany) — look for the quantum photonics or quantum optics group lead

Order a report on this consortium See UNIVERSITAET PADERBORN profile →

Next steps

Talk to the team behind this work.

Want to understand how quantum repeater technology could fit into your security roadmap? SciTransfer can arrange a briefing with the research team and help you evaluate licensing or collaboration options.

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