Overview
- On July 8, 2025, Aalto University reported echo coherence peaks at 1 millisecond and a median of 0.5 milliseconds for a transmon qubit, shattering previous records.
- Published in Nature Communications, the study details methods that extend the operational window for error-free quantum operations.
- Qubits were fabricated by the Quantum Computing and Devices group using VTT superconducting film and processed in Micronova cleanrooms at Finland’s OtaNano facility.
- The team released comprehensive fabrication and measurement protocols to ensure global replication and accelerate advances in quantum hardware.
- Extended coherence times significantly reduce the overhead required for quantum error correction and bolster Finland’s leadership in quantum technology.