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This article is about quantum computing hardware: silicon spin qubits, a five-qubit array, and gate fidelity under parallel control, so it passes the topic gate. The primary category is Quantum Computing. The work is a single-lab result published in Nature Physics, and its practical weight rests on whether the pairwise calibration approach holds up as qubit counts grow beyond three simultaneous operations.
Riken Institute’s work scales up silicon-based quantum processors
Silicon spin qubits are a promising platform for building scalable quantum computers, but typically lose accuracy when several qubits are under parallel control. Researchers from the RIKEN Center for Emergent Matter Science achieved high-fidelity control of multiple silicon spin qubits operating in parallel, identifying and mitigating a key source of errors, and representing an important step toward scaling up silicon-based quantum processors.
Researchers from the RIKEN Center for Emergent Matter Science and collaborators have achieved high-fidelity control of a five-qubit silicon array using a single shared microwave line, a technique that addresses a key obstacle to building larger quantum processors. Silicon spin qubits, promising for their compatibility with existing chip manufacturing, previously suffered accuracy loss during parallel operation; the team identified the AC Stark shift…
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