Silicon qubits exceed 99.99% gate fidelity while three operate together

Silicon spin qubits achieved gate fidelity above 99.99% while three qubits operated at once. The platform is compatible with chip-making technologies, but parallel control has typically reduced qubit accuracy.

Phys.org has reported:

Silicon spin qubits exceeded 99.99 per cent gate fidelity while three qubits operated simultaneously, according to the headline. The result addresses a known challenge for the technology.

Silicon spin qubits are considered promising for scalable quantum computers because they are compatible with semiconductor manufacturing methods used to make today’s computer chips. They typically lose accuracy when several qubits are controlled in parallel, while useful quantum computers will need to operate many qubits at once without reducing operation accuracy.