Speaker
Description
We study the effect of reheating phase on the evolution of complexities in the primordial scalar fluctuations using the squeezed formalism. We study the evolution of the out-of-time correlator (OTOC) and the quantum discord starting from the inflationary epoch till the radiation-dominated epoch with different types of reheating phases. We find that, for a mode that re-enters the horizon after reheating, a finite reheating epoch clearly distinguishes the characteristic OTOC and quantum discord \textit{freeze-in} amplitude into three different classes that only depend on whether the equation of state parameter: $(i)$ $\wre=1/3$ $(ii)$ $\wre<1/3$, or, (iii) $\wre>1/3$ and not on particular reheating histories. Taking the central value of $n_s$ as and $\wre=0.25$ benchmark values, we found that the behavior of the complexities for all modes smaller than $1.27\times10^{16}\mathrm{Mpc^{-1}}$ can be classified as above. Conversely, for modes re-entering the horizon during reheating, the signature of EoS on the evolution of the complexities will be embedded in each separately.
