Multicomponent solution in modified theory of gravity in the early universe

TL;DR

This paper explores a modified gravity theory with multiple perfect fluids during early universe inflation, deriving equations of state and discussing gravitational baryogenesis.

Contribution

It introduces a multicomponent approach in modified gravity theories and links inflationary parameters to the gravity Lagrangian.

Findings

Derived equations of state parameters for multicomponent fluids during inflation

Connected inflationary parameters with modified gravity Lagrangian

Brief discussion on gravitational baryogenesis in the model

Abstract

We study the modified theory of gravity in Friedmann Robertson Walker universe composed of several perfect fluids. We consider the power law inflation and determine the equation of state parameters in terms of the parameters of modified gravity's Lagrangian in the early universe. We also discuss briefly the gravitational baryogenesis in this model.