controlled-phase gates, and controlled-not gates. The review focuses on two main types of silicon spin qubits: gate-defined quantum dots and donor-based quantum dots. Gate-defined quantum dots are ...

Here we demonstrate the first integrated photonic controlled-NOT (CNOT) gate for polarization-encoded qubits. This result has been enabled by the integration, based on femtosecond laser waveguide ...

By optimizing the speed of quantum gates and the effect of noise, we have realized a controlled-NOT gate with a fidelity as high as 99.5% which is believed to be sufficient for fault-tolerant quantum ...