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A scenario of the inflaton evolution from cosmic inflation and mattercreation to dark matter/dark energy today is presented. To start with, a modelof the inflationary phase of the inflaton is introduced. The inflaton rollsdown a hilltop potential along with matter creation being dragged down by thepresence of matter. Presence of matter provides a mechanism to stop universe'sacceleration and hence the inflationary phase. The model predictions for thestandard metrics are fully consistent with the current CMB limits. Thepotential could in principle be extended to complete a potential hillsubsequent to inflation. The evolution of the inflaton from the inflationaryphase to radiation/matter dominated eras and to current times can be inferredqualitatively following the evolution of its equation of state parameter.Existence of solutions to its dynamics, tracking matter as it evolves tocurrent times, provides a plausible reasoning for the relative order ofmagnitudes of the cosmological parameters, in particular to the relativeabundance of dark matter today.

From Cosmic Inflation and Matter Creation to Dark Matter -- Journey of the Inflaton?