Inflation in mimetic f (R, T) gravity

被引：14

作者：

Bhattacharjee, Snehasish ^{[1
]}

机构：

[1] Indian Inst Technol, Dept Phys, Hyderabad 502285, India

来源：

NEW ASTRONOMY | 2022年 / 90卷

关键词：

Modified gravity; Inflation; Mimetic gravity; Observational constraints; UNIVERSE SCENARIO; FLUCTUATIONS; RECONSTRUCTION; COSMOLOGY; FLATNESS; HORIZON; F(R;

D O I：

10.1016/j.newast.2021.101657

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

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.

引用

页数：8

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