Fig. 4: This shows a comparison between Fermi (Drude) and Bose conductivities.
From: Universal approach to light driven “superconductivity” via preformed pairs
a Plots the real part of the conductivity, and b plots the imaginary counterpart. As long as the characteristic (low) energy scales are similar, the transport properties are also comparable. Note also that σ1 (ω) is quite a bit smaller in the relevant frequency range, than σ2 (ω). The computed values in the range varying from 3 meV to around 10 meV, are in reasonable agreement with the experiment.
