Fig. 2
From: Realisation of high-fidelity nonadiabatic CZ gates with superconducting qubits

Superconducting quantum processor. a Superconducting quantum circuit. Our qubits are capacitively coupled to their neighbours. Each qubit is capacitively coupled to an XY control line and a readout resonator, and inductively coupled to a Z control line. b Energy level at idle point and CZ swap point. Left shows energy levels without frequency tuning; right shows energy levels at the interaction point