Confinement modulation during shuttling enables dressed-state dynamical decoupling that mitigates both global and local magnetic/electric noise in hole-spin qubits.
Eight-Qubit Operation of a 300 mm SiMOS Foundry-Fabricated Device
3 Pith papers cite this work. Polarity classification is still indexing.
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abstract
Silicon spin qubits are a promising platform for quantum computing due to their high coherence, controllability, and CMOS manufacturability, yet scalable implementations have so far been limited to a few qubits. Here, to take a step towards larger qubit systems, we tune and coherently control an eight-dot linear array of silicon spin qubits fabricated in a 300~mm CMOS-compatible foundry process, establishing operational scalability beyond the two-qubit regime. All eight qubits are successfully tuned and characterized as four double-dot pairs, exhibiting Ramsey dephasing times $T_2^*$ up to 41(2)$~\mu$s and Hahn-echo coherence times $T_2^{\mathrm{Hahn}}$ up to 1.31(4)$~$ms. Readout of the central four qubits is achieved via a cascaded charge-sensing protocol, enabling high-fidelity measurements of the entire multi-qubit array in a two step process. Additionally, we demonstrate a two-qubit gate operation between adjacent qubits with low phase noise. We show that silicon spin qubit arrays can be scaled to medium-sized arrays of 8 qubits while maintaining system coherence.
years
2026 3verdicts
UNVERDICTED 3representative citing papers
Spin-qubit operation is framed as a modular automation problem with five modules to enable scalable stable arrays via interfaces, standardized data products, and workflow metrics.
Experimental demonstration of universal controllability, parallel readout, and certified three-qubit GHZ entanglement with extended lifetime in a two-unit-cell SiMOS quantum processor.
citing papers explorer
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Suppressing spin qubit decoherence during shuttling via confinement modulation
Confinement modulation during shuttling enables dressed-state dynamical decoupling that mitigates both global and local magnetic/electric noise in hole-spin qubits.
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Overcoming Configuration Bottleneck: Modular Pathways to Stable Semiconductor Spin-Qubit Arrays
Spin-qubit operation is framed as a modular automation problem with five modules to enable scalable stable arrays via interfaces, standardized data products, and workflow metrics.
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Multi-Qubit Entanglement of Unit Cell Pairs in SiMOS
Experimental demonstration of universal controllability, parallel readout, and certified three-qubit GHZ entanglement with extended lifetime in a two-unit-cell SiMOS quantum processor.