Figure 3: Control pulses.
From: A strict experimental test of macroscopic realism in a superconducting flux qubit
To measure dg, dρ, de, the control circuitry of our system was arranged in three separate experiments so that the pseudo-spin rotation angles of S1 and S2 were, respectively (0, θ),(θ, θ),(2θ, θ) for a range of angles θ. We then selected the data corresponding to θ=π/2, (c.f. Fig. 1b,c) which corresponds to a certain microwave pulse power (shown with a dotted vertical line). Error bars correspond to a 95% confidence interval. The microwave amplitude shown is at the signal generator (it is attenuated before reaching the flux qubit). For quantum mechanical curves, see Supplementary Note 2 and Supplementary Fig. 1.
