Extended Data Fig. 2: Static dispersive shifts of the L transmon.
From: Strong parametric dispersive shifts in a statically decoupled two-qubit cavity QED system
As with Fig. 3 in the main text for the R transmon, we performed the same measurements with the L transmon. (a) The static dispersive shift ∣2χsL/2π∣ as a function of the L transmon frequency. For empty squares, the dispersive shift was measured by comparing the cavity response with the L transmon in either state \({\left\vert g\right\rangle }_{L}\) or \({\left\vert e\right\rangle }_{L}\). For filled circles, the dispersive shift was extracted by measuring additional dephasing ΓnL while driving the cavity with a weak coherent state. The solid line represents a fit to the data based on the circuit model. (b) Additional dephasing as a function of average photon number \(\bar{n}\) of a weak coherent drive at three different flux biases where the R tranmon frequencies are 5.784 (red square), 5.826 (yellow circle), and 5.858 GHz (green triangle), respectively. Solid lines are linear fits to the data.
