Figure 3
Quality factors of Resonator 1 and resonances of Resonator 2 for Sample A. (a) Measured loaded quality factor, QL, for mode 2 (blue circles) and for mode 4 (red squares) as functions of the magnetic flux through the SQUID together with the simulated values (dashed line and dash-dotted line, respectively). (b) Absolute value of the simulated scattering parameter S21 of Sample A with only Resonator 2, i.e., at the limit CC → ∞. The colour bar is truncated at 0.999 for clarity. (c) Measured loaded quality factor, QL, of Sample A (markers) for the first four modes as functions of power at Port 1. (d) Measured QL of Sample A (circles), predicted external quality factor, Qext, (squares) and calculated internal quality factor, Qint, (triangles) as functions of the mode number. The simulation parameters are given in Table 1. In (a), the power at Port 1 is approximately −90 dBm, and in (d) −85 dBm. In (c) and (d), the magnetic flux through the SQUID is Φ/Φ0 = 0.5.
