The Two-Phases Proposal for Inflation in the Constant-Roll Field with f(Q) Gravity

In this study, we discuss the evolution of the high-energy era of the universe in the background of f(Q) gravity. For this purpose, the constant-roll condition is considered in the early universe dynamics. After the unified solution of the field equations, the early universe era is analyzed through model parameters in the framework of the constant-roll inflationary field. Along with it is compatible with the observation data, it has been determined that the universe evolved from the initial quasi-de Sitter vacuum state to a quintessence vacuum within the framework of observational data. It is observed that this occurs when the constant-roll parameter is fixed in the parameter space.