The cavity quality factor is often defined as 𝑄 = 𝜏 -1 c 𝜔 0 for the resonance condition. For the recent VSC experiment by Ebbesen , the typical values for these parameters are 𝜏 c ≈ 100 fs (reading from a width of Γ c = 𝜏 -1 c ≈ 53 cm -1 of the cavity transmission spectra). If the cavity frequency 𝜔 c = 𝜔 0 = 1200 cm -1 , then the quality factor is 𝑄 ≈ 22.6. However, for the current theory, the overall rate constant would not explicitly depend on 𝑁 (Eq. 30), meaning that only for the small 𝑁 and strong coupling between molecules and the cavity mode there will be an appreciation amount of the cavity-modified effect. This is in contrast to the experimental observation of the collective effect and should be viewed as a major limitation of current theory.