A coherent coupling among different energy photons provided by nonlinear optical interaction is regarded as a photonic version of the Rabi oscillation. Cavity enhancement nonlinearity reduces requirement significantly and pushes scalability frequency-encoded circuit based on However, confinement in cavity severely limits number interactable frequency modes. Here we demonstrate wide-bandwidth ef...

The authors propose an approximation to the quantum Rabi model, which improves upon widely used adiabatic approximation. This generalized approach predicts level crossings correctly and could potentially be applied other Rabi-type light-matter interaction models.