Nord Quantique has announced a significant physics breakthrough that advances the field of quantum error correction (QEC) and positions its hardware for scalable, fault-tolerant performance with major energy efficiency gains. By implementing multimode encoding using a bosonic Tesseract code, the company demonstrated a new error correction technique that supports high performance while minimizing physical hardware overhead.
Multimode encoding enables multiple quantum modes within a single aluminum cavity to encode individual qubits, improving protection against errors such as bit flips, phase flips, and leakage. Nord Quantique’s implementation showed no measurable decay in quantum information over 32 correction cycles, using post-selection to discard 12.6% of imperfect runs. This performance suggests scalability: more modes can be added without increasing the number of physical qubits, achieving a 1:1 ratio between physical cavities and logical qubits.
The company projects that its approach will allow quantum systems with over 1,000 logical qubits to occupy just 20 square meters—small enough for integration into conventional data centers. In a benchmark comparison using RSA-830, Nord Quantique estimates a 99.6% reduction in power consumption compared to classical HPC, with projected energy use of 120 kWh versus 280,000 kWh for conventional methods. Its 1 MHz clock speed also offers an efficiency edge over other quantum platforms.
Nord Quantique aims to deliver its first utility-scale machines exceeding 100 logical qubits by 2029. The new multimode approach provides a scalable path toward error-corrected quantum systems with substantial reductions in energy demand, system size, and infrastructure complexity, enabling cost-effective deployment in commercial computing environments.
For more information, see the official press release here, the technical paper here, and the blog post here.
May 29, 2025
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