Fig. 3: Representative example of relaxation time dependence on frequency.

a Measured probability of being in the \(\left|1\right\rangle\) state, P₁, at 50 μs wait time with varying Δω_q and tone detuned 50 MHz above ω_q/2π for Q₁₉. b Example of Ramsey measurements used to extract frequency shifts Δω_q/2π from pulse amplitudes. The two curves result from starting the Ramsey oscillations with a X_π/2 or Y_π/2. c and d are T₁ measurement with Stark shifts Δω_q/2π = −18.9 and −5.3 MHz, respectively. e T₁ measurement with no Stark shift (i.e., no Stark tone).