Figure 1
From: Digital Quantum Rabi and Dicke Models in Superconducting Circuits

Frequency scheme of the stepwise implementation for the quantum Rabi Hamiltonian.
A transmon qubit of frequency ωq is interacting with a microwave resonator, whose transition frequency is ωr. The interactions H1,2 in Eq. (3) are simulated respectively with a Jaynes-Cummings interaction (step 1) and another one with different detuning, anticipated and followed by π pulses (step 2).