Fig. 3.

(a) $g_2$ obtained from the Monte Carlo wave model averaged over 500 independent simulations compared with the theoretical expression of $g_2(\tau )=1+(\exp (-2\tau /{\tau }_c))$. (b) $\sigma (\tau )=\mathrm{std}(g_2(\tau )-1)$ obtained from Monte Carlo wave model with 500 independent simulations compared with the theoretical prediction given in Eq. (9). The parameters used are $T_b=1\mu \mathrm{s}$, $T=10\mathrm{ms}$, $\beta =1$, $⟨n⟩=0.1$, and ${\tau }_c\approx 32\mu \mathrm{s}$ obtained from fitting in (a). The total number of photons used in the Monte Carlo simulation is ${10}^8$.