Quantum origin to Classical existence : A plausible explanation

Cosmic inflationary paradigm beautifully explains the origin of the large structures, like galaxies and cluster of galaxies, we observe today in our universe. But the fluctuations during inflation, which seed these large scale structures, were quantum by origin, whereas the structures which were developed due to gravitational instability seeded by these quantum perturbations are all classical. Thus the persisting question of how and when these primordial quantum perturbations become classical still plagues the basic concept behind inflationary paradigm. In this talk we will seek for a plausible answer to this lingering issue by implementing collapse models of quantum mechanics in early universe.