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Eight Qubits Leave the Two-Qubit Foundry
Imec and Diraq coherently operated an eight-qubit silicon array made on a 300-millimeter CMOS-compatible foundry process, extending industrial fabrication beyond isolated pairs.
Summary
Imec and Diraq coherently operated an eight-qubit silicon array made on a 300-millimeter CMOS-compatible foundry process, extending industrial fabrication beyond isolated pairs.
Imec and Diraq tuned and individually controlled eight silicon MOS spin qubits fabricated with a 300-millimeter CMOS-compatible process. The peer-reviewed Nature Communications paper reports Ramsey dephasing times up to 41 microseconds, Hahn-echo coherence up to 1.31 milliseconds, cascaded readout of the central four qubits, and a two-qubit gate between one neighboring pair. This is a manufacturing-and-control milestone, not a useful quantum computer: the authors say entangling gates across the paired unit cells remain to be shown, while fault-tolerant designs will require higher-dimensional connectivity and more reliable exchange control.
Why it matters
Imec and Diraq coherently operated an eight-qubit silicon array made on a 300-millimeter CMOS-compatible foundry process, extending industrial fabrication beyond isolated pairs.
Limits and context
- This is a manufacturing-and-control milestone, not a useful quantum computer: the authors say entangling gates across the paired unit cells remain to be shown, while fault-tolerant designs will require higher-dimensional connectivity and more reliable exchange control.
Key claims
Imec and Diraq coherently operated an eight-qubit silicon array made on a 300-millimeter CMOS-compatible foundry process, extending industrial fabrication beyond isolated pairs.
Qualification: This is a manufacturing-and-control milestone, not a useful quantum computer: the authors say entangling gates across the paired unit cells remain to be shown, while fault-tolerant designs will require higher-dimensional connectivity and more reliable exchange control.
Evidence: source-2026-07-13-021
Sources
- Imec: Eight silicon MOS spin qubits on a 300mm foundry processImec · secondary reporting
Corrections
No corrections have been recorded for this story.