Fig. 3: This shows the changes in σ2(ω) before (red) and after (blue) exposure to radiation.
From: Universal approach to light driven “superconductivity” via preformed pairs
The dotted green line indicates the lower frequency cut-off set by the experiments. This figure indicates how the signature upturn in σ2(ω) is enhanced by the effective increase in T* associated with exposure to radiation. The blue line can be compared with a typical superconductor, presuming, for example a superfluid density ratio of ns/n ≈ 0.6.
