Figure 4
The fidelities of the present deterministic scalable universal quantum gates on electron-spin systems vs the coupling strength g/κ and the side leakage rate κs/κ.
(a) The fidelity of the CNOT gate FCT; (b) the fidelity of the Toffoli gate FT. 
and γ = 0.1κ are taken for (a) and (b) as γ is about several µeV in experiment.
