Technology / Hardware / Silicon spin qubits
Silicon spin qubits
Electron or nuclear spins in semiconductor devices.
The tradeoff
Strengths: Tiny footprint; Compatibility with chip manufacturing.
Challenges: Uniformity; Control; Cryogenic integration.
Maturity: research → prototype.
Specific gate speeds, fidelities and qubit counts are not published here, they change quarterly. Verify against each company's latest technical publications, not press releases.
Who is pursuing it
Intel
Betting that qubits should be built like transistors: silicon spin qubits made on standard 300mm wafers.
public · INTC
Diraq
Sydney spin-out commercializing decades of UNSW silicon-qubit research.
private
Quantum Motion
UK company building silicon spin qubits with standard CMOS processes.
private
Silicon Quantum Computing
Australian company placing individual phosphorus atoms in silicon with atomic precision.
private
Quobly
French (CEA-Leti spin-off) silicon-spin company leveraging the Grenoble microelectronics ecosystem.
private