Simultaneous high-fidelity single-qubit gates in a spin qubit array

Demonstrates high-fidelity individual and parallel single-qubit control in a five-qubit silicon spin array using tailored pulses and pairwise calibration of microwave-drive-induced AC Stark shifts.

Key Results

• Primitive $X$ and $Y$ gate fidelities above $99.99\%$ for all five qubits when operated individually, with some approaching $99.999\%$.
• Interleaved-RB $X_{\pi /2}$ fidelity of $99.9985(8)\%$ and $Y_{\pi /2}$ fidelity of $99.995(1)\%$ on a representative qubit.
• Simultaneous operation of up to three qubits retained primitive-gate fidelities above $99.99\%$; five-qubit parallel operation remained above $99.9\%$.

Links

• Journal: Nature Physics
• arXiv: 2507.11918

Zoo Links

• quantum-gate
• spin-qubit
• silicon-spin-qubit