Quantum CNOT Gate for Spins in Silicon

Understand

Single qubit rotations and two-qubit CNOT operations are crucial ingredients for universal quantum computing.

• While high fidelity single qubit operations have been achieved using the electron spin degree of freedom, realizing a robust CNOT gate has been a major challenge due to rapid nuclear spin dephasing and charge noise.
• We demonstrate an efficient resonantly-driven CNOT gate for electron spins in silicon.
• Our platform achieves single-qubit rotations with fidelities >99%, as verified by randomized benchmarking.