Denmark to host the world's most powerful Quantum Computer - here’s why it matters

Construction of the machine will begin in autumn 2025, with initial operations expected by late 2026 or early 2027. Once completed, The computer - named Magne - will be accessible to European researchers and companies, offering a state-of-the-art platform for tackling problems far beyond the reach of today’s classical computers.

But while much of the spotlight has (rightly) been on hardware performance, those working closest to the field say the real breakthrough lies in what it unlocks next.

From Quantum-safe communication to secure quantum computing

Partisia is already a central role in the Access QKD project - a project aimed at establishing quantum-safe communication channels through quantum key distribution (QKD). These efforts ensure that data can be exchanged securely without the risk of it ever being exposed without the risk of interception. Noteworthily, this is guaranteed to hold independently of future advances in computing power such as quantum computers.

Now, with MAGNE under development, focus is shifting from utilizing quantum mechanics to securely transmit data to utilizing it to compute on data.  

Computing without revealing

This is where confidential computing and technologies like secure Multi-Party Computation (MPC) become essential.

While Magne, as mentioned earlier, will be physically located in Denmark, its services are expected to be cloud-based and shared across borders. In practice, that means users from across Europe will submit their quantum tasks remotely, posing serious questions about how to protect sensitive inputs and outputs.

Using a quantum computer like Magne naively  requires  the party that wishes to perform the computation, to send the inputs to the computation in clear text. That opens the door to potential security risks: operators of the infrastructure could, in theory, access the user’s data or final result.

Partisia is among those developing solutions to solve exactly this challenge, known in the research community as Blind Quantum Computation. Similar to classical methods like Secure Multiparty Computation (MPC), Blind Quantum Computing performs a computation without revealing anything except the output. With this technology, users of Magne can provide inputs and receive outputs without worrying about the infrastructure provider seeing their proprietary data or novel research results.

Denmark positioned to lead with trust and transparency

While other countries race to build more powerful machines, Denmark’s approach is gaining attention for its broader vision. By combining hardware investment with a strong foundation in ethics, privacy, and open collaboration, Denmark is creating a model that prioritizes trust alongside technology.

A clear signal to Europe and beyond

Magne positions Denmark as a key player in the quantum computing space within Europe. The acquisition therefore aligns with growing calls for data sovereignty within Europe. Aiding in this alignment are the technologies and products of Partisia, many of which help users and businesses with both classical and quantum data sovereignty.

Magne and Partisia reinforces Denmarks position in the emerging quantum landscape not just within Europe, but globally as well.

What’s next?

Magne is expected to reach early prototype phases by 2026 and be fully operational by 2030. In the meantime, the supporting ecosystem - secure infrastructure, and privacy-first computation models - is already taking shape.

And for companies like Partisia, that’s where the real work begins.