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This breakthrough demonstrates that hole spin qubits in standard silicon can achieve single-qubit fidelities of 99.8%, validating a scalable path for quantum computing using existing CMOS infrastructure without isotopic purification. By leveraging industrial-grade fabrication processes and near-identical geometries to electron spin qubits, this work significantly lowers the barrier to integrating high-fidelity quantum logic into future quantum-CMOS architectures.

Surse care acoperăQuantum Zeitgeist, InfoQ

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Hole spin qubits hit 99.8% accuracy on standard silicon

Quantum Zeitgeist27 august 20266 min de cititArticolul și perspectiva sunt în engleză.

Silicon spin qubits in gate-defined quantum dots leverage established semiconductor infrastructure, offering a scalable path toward transformative quantum technologies. Hole spins in silicon offer compact, all-electrical control, retaining features of a quantum dot qubit architecture, though silicon hole spin qubits are not as advanced as electrons due to increased susceptibility to disorder and more complex spin physics.

Researchers at the University of New South Wales and IMEC have achieved single-qubit gate fidelities up to 99.8% using hole spin qubits fabricated in natural silicon. This result, representing the highest performance reported to date in this material, advances silicon-based quantum computing by leveraging existing semiconductor manufacturing processes. The work demonstrates fast qubit control and exchange pulsing within a device with near-identical geometries and fabrication procedures used in recent high-fidelity electron spin qubit measurements. With future optimizations, these hole spin qubits are expected to enable new capabilities for quantum CMOS architectures. Hole Spin Qubit Performance: 99.8% Accuracy in Natural Silicon A single-qubit gate fidelity of up to 99.8% has been demonstrated using hole spin qubits fabricated on a standard silicon…

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