Industry-grade Quantum Memory Links enabling the Quantum Internet

Introduction

The prospect of a “Quantum Internet” interconnecting quantum computers and sensors via quantum information networks (QINs) promises to enable new technological and societal breakthroughs. Quantum “entanglement” between pairs of particles enables the prospect of absolutely secure communications and distributed quantum computing within the QIN.

Challenges

However, quantum principles render classical techniques for extending range inapplicable. A Quantum Internet thus requires an efficient means of enabling reliable quantum links.

Project Overview

QMLINK builds upon our team’s work within the EU Flagship Quantum Internet Alliance (QIA) project in developing a quantum memory (QM) based upon laser-cooled ensembles of cold atoms and quantum networking protocols leveraging this technology.

Achievements

Welinq’s QM, with a world record 90% storage efficiency, makes quantum interconnection possible. Our ambitious project goal is to develop the world’s first industry-grade QM links for QINs, combining:

1. High efficiency
2. Long storage time
3. Integrated frequency conversion for interfacing with optical telecommunication bands

Importance of Quantum Repeaters

Welinq’s QM addresses the critical need for quantum repeaters essential for secure, fast communication at long distances. We have a well-defined plan to achieve TRL6 while attaining storage times at least an order of magnitude beyond state-of-the-art for high-efficiency QM, which will greatly increase the maximal ranges and capabilities of QINs.

Implementation

We will integrate our QM link solution in the QIN test-bed deployed throughout the Paris region (ParisRegionQCI) to:

• Demonstrate our system at a TRL6 level
• Showcase our product to potential customers and key QIN industry players
• Gain invaluable insight towards realizing the Quantum Internet

Conclusion

EIC support will accelerate our translation of cutting-edge research into industrial products critical to European quantum sovereignty, advancing towards applications of our QM in distributed quantum computing, while creating high-quality jobs for a digital Europe.