Fig. 5.

textbfa Measured transition frequencies of resonator and qubit states determined by monitoring the resonator dispersive shift, as a function of applied flux bias $\mathit{\Phi }$. b Close-up of the resonator–qubit hybridisation point, showing the anti-crossing of the resonator and qubit states. (Model of the hybridised resonator–qubit states shown overlaid.) The faint diagonal lines visible are due to weak hybridisation of the resonator under study with a qubit in a remote resonator (Color figure online)