Figure 1

The effective coupling strength ${\lambda }_{\mathrm{eff}}$ divided by the original coupling strength $\lambda$ from Eq. (1) as a function of the driving amplitude $\Omega$ divided by the interqubit detuning $\Delta$. Here we assume equal driving amplitudes for the two qubits.Reuse & Permissions

Figure 2

(Color online) The occupation probabilities of the four computational states as functions of time. The black, blue (gray), green (light-gray), and red (dark-gray) lines (the black and red lines are indistinguishable from the $x$ axis) correspond, respectively, to the states $\mid gg⟩$, $\mid ge⟩$, $\mid eg⟩$, and $\mid ee⟩$. The initial state is $\mid ge⟩$, ${\omega }_1∕2\pi =5\mathrm{GHz}$, ${\omega }_2∕2\pi =4\mathrm{GHz}$, $\lambda ∕2\pi =0.1\mathrm{GHz}$, and $\delta {\omega }_1=-\delta {\omega }_2=0.15\mathrm{GHz}$. The amplitudes of the driving fields were adjusted to reach optimal results, keeping ${\Omega }_1={\Omega }_2$. The driving fields are turned on and off over durations of $20\mathrm{ns}$ (note that the time of turning on and off the driving fields is not included in the time axis). In order to see the reduction in crosstalk effects, this figure can be compared with Fig. 4(b) of Ref. 7.Reuse & Permissions

Figure 3

(Color online) Same as in Fig. 2 (the blue and green lines are now indistinguishable from the $x$ axis), but the initial state is $\mid gg⟩$ and $\delta {\omega }_1=0.14\mathrm{GHz}$.Reuse & Permissions