Julien Camirand Lemire, co-founder and CEO of Nord Quantique, is interviewed by Yuval Boger. Julien discusses Nord Quantique’s bosonic code approach, which uses microwave photons in superconducting cavities to achieve quantum error correction without large qubit overhead, including their GKP and Tesseract code demonstrations and a quantum error correction gain that has more than doubled since 2024. They explore the company’s roadmap toward 10^-7 to 10^-9 error rates by 2032, the four-qubit system entering operation this year, and how Quebec’s Sherbrooke ecosystem has enabled a capital-efficient build. They also discuss high-rate codes, transmon-based scaling challenges, and much more.
Key takeaways
Nord Quantique packs redundancy into single superconducting cavities using bosonic codes like GKP and Tesseract, aiming for a one-to-one ratio of cavities to error-corrected qubits instead of the usual 100-to-1 or 1000-to-1 overhead.
Their quantum error correction gain has more than doubled since the 2024 memory demo, moving from a factor of about 1.1 to over 2, with full X and Z correction and no post-selection.
The company targets 10^-7 to 10^-9 error rates by 2032, aiming to fit more than 2000 logical qubits into a 10 square meter cryogenic footprint, with a four-qubit gate-capable system going into operation this year.
Being a spin-off of Quebec’s Sherbrooke ecosystem let Nord Quantique rent existing fabs, fridges, and benchmarking infrastructure tied to over a billion dollars of prior investment, making the build capital efficient by design.
🎧 Listen on Spotify:
· 📄 Full transcript: https://podcast.yboger.com/2026/07/20/julien-camirand-lemire-ceo-of-nord-quantique/
- Subscribe on Substack at https://qubitguy.substack.com
- Also, check out the quantum bits comics at https://QuantumBitsComics.com
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