Finnish researchers extend quantum coherence beyond one millisecond
Quantum coherence record promises simpler error correction and better system scaling.
Aalto University researchers have achieved a milestone in quantum computing by extending the coherence time of a superconducting transmon qubit beyond one millisecond. The breakthrough significantly improves how long quantum states remain stable, enabling more reliable operations.
The Finnish team used ultra-pure materials and precision engineering techniques to fabricate the qubit, achieving a median coherence time of 541 microseconds and a peak of 1057 microseconds.
Unlike earlier coherence records set by more exotic qubit types, Aalto’s success came within the widely used transmon framework, making it easier for others to replicate. The researchers published detailed fabrication methods to help advance consistency across labs globally.
Crossing the millisecond mark opens new possibilities for scalable quantum systems, reducing the burden of error correction. Finland’s growing leadership in the field is further solidified as other research teams explore Aalto’s reproducible approach.
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