Inflation in mimetic f (R, T) gravity

In this paper, we employ mimetic f(R, T) gravity coupled with Lagrange multiplier and mimetic potential to yield viable inflationary cosmological solutions consistent with latest Planck and BICEP2/Keck Array data. We present here three viable inflationary solutions of the Hubble parameter (H) represented by H(N) = (Aexp beta N + B alpha N)gamma, H(N) = (A alpha N + BlogN)gamma, and H(N) = (Ae beta N + BlogN)gamma, where A, beta, B, alpha, gamma are free parameters, and N represents the number of e-foldings. We carry out the analysis with the simplest minimal f(R, T) function of the form f(R, T) = R + chi T, where chi is the model parameter. We report that for the chosen f(R, T) gravity model, viable cosmologies are obtained compatible with observations by conveniently setting the Lagrange multiplier and the mimetic potential.

Automated summary

In this paper, three viable inflationary cosmological solutions are proposed by employing mimetic f(R, T) gravity coupled with Lagrange multiplier and mimetic potential, which are consistent with the latest observational data. The analysis is conducted with the simplest minimal f(R, T) function, and viable cosmologies are obtained by appropriately adjusting the Lagrange multiplier and the mimetic potential, demonstrating the validity of the model.