Going from small to large-scale quantum computers requires overcoming several challenges. One is how to (optically) address each qubit in a large array, without needing a vast number of input/ output connections to the chip? In fact, quantum chips need to be controlled just like conventional CPUs, which contain billions of transistors, but are interfaced (to a motherboard) using only a few hundred input/ output connections. Achieving this means not only i) manufacturing quantum chips using the same processes used to make conventional CPUs, but also ii) designing the electronic circuits in a way that they can function at the ultralow temperatures (-273 degrees) (required for stable qubit operation). UK-based Quantum Motion (QM) has demonstrated...

France-based, Welinq is a quantum computer startup, specifically focused on “quantum memory” . Welinq’s quantum memory interconnects facilitate the storage & on-demand release of quantum info. They work by leveraging laser-cooled neutral atom technology that has demonstrated 90% efficiency in storage & retrieval. This enables to scale-up quantum computers (by entangling physically separated quantum processing units), short-cutting error correction (by redundantly encoding quantum info on many physical qubits), the deployment of QPUs on premise, in the cloud & quantum information networks. (Ps: another Paris-headquartered startup betting on neutral atoms is Pasqal, which we covered here). Welinq was founded in 2022 by Tom Darras (CEO), Jean Lautier-Gaud (CCO), Julien Laurant (Scientific Advisor) & Eleni Diamanti (Scientific...