Figure 2. A transmon qubit and microwave resonator simulating the quantum Rabi Hamiltonian in the regime , .

The ideal dynamics, plotted in the inset, shows collapses and revivals of the photon and qubit population. The latter are recovered via sequential qubit-resonator interactions and qubit flips. The photon population is pumped to the expected value at the time marked by the arrow. Note that the simulating time is different from the simulated time t.