Figure 4
From: Light-matter decoupling and A2 term detection in superconducting circuits
Spectral properties without the A2 term (Δ = 0), as a function of the normalized frequencies ωk = ωk/ω0 and momenta.
Mode eigenfrequencies (a) and spectral functions for the capacitive (b) and inductive coupling (c). The simulation assumes a waveguide with L = 10λ0, where λ0 is the wavelength associated to ω0 and uses M = 40,80,160 and 320 modes to extrapolate the dispersion relation.
