Figure 4 | Scientific Reports

Figure 4

From: Realization of efficient quantum gates with a superconducting qubit-qutrit circuit

Figure 4

Numerical simulation of the implementation of the ccz gate in the rotating frame. The phase of the right qubit is flipped, \(|{0}_{H}\rangle \to |{1}_{H}\rangle \), if the left qubit is in state \(|\uparrow \rangle \) and the qutrit is in state \(|0\rangle \), otherwise no change occurs as exemplified in (a) for the state \(|\uparrow 2\,{0}_{H}\rangle \) and in (b) for the state \(|\downarrow 0\,{0}_{H}\rangle \). A subsequent Hadamard gate on the right qubit will yield the desired ccnot gate. The standard circuit representation of the Toffoli gate is shown as an inset in the upper panel of the figure. See Supplementary Note 2 for the parameters used in the simulation.

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