Fig. 10: Comparison the values of Γ2 extracted from different methods.
From: Quantum efficiency, purity and stability of a tunable, narrowband microwave single-photon source
\({{{\Gamma }}}_{{{{{{\rm{2}}}}}}}^{{{{{{\rm{Ref}}}}}}}\), \({{{\Gamma }}}_{{{{{{\rm{2}}}}}}}^{{{{{{\rm{M.T.}}}}}}}\) and \({{{\Gamma }}}_{{{{{{\rm{2}}}}}}}^{{{{{{\rm{Decay}}}}}}}\) are extracted from the reflection coefficient, off-resonant Mollow-triplet power spectrum and the exponential decay of the qubit emission after a π/2-pulse, respectively. In the plot, the error bars are for two standard deviations. Note that the slight difference at 5.1 GHz between the Mollow-triplet and other two measurements is from that the sampling rate of the digitizer is not large enough, leading to the truncation at the edge of the measured power spectrum. See more detail about how to use the power spectrum to extract the qubit decay rates in ref. 30. The error bars are two standard deviations.
