5.6
5.7
5.8
5.9
6
6.1
-0.2
-0.1
0
0.1
0.2
probe frequency (GHz)
flux (Phi / Phi0)
0-1 and two-photon 0-2 spectroscopy, alpha = -230 MHz
0.2
0.4
0.6
0.8
1
response (a.u.)