Figure 6
From: Photonic ququart logic assisted by the cavity-QED system
Average fidelities of ququart gates.
(a) The average fidelity F(Z4) of the ququart gate Z4(θ) versus the normalized coupling strengths κs/κ and g/(κ + κs). (b) The average fidelity F(C[T3]) of the controlled ququart gate C[T3(ϑ)] versus the normalized coupling strengths κs/κ and g/(κ + κs). The coupling strength is defined by η = 0.2κs. The average fidelity is computed as the average of random θ and ϑ.
