The bouncing cosmology with F(R) gravity and its reconstructing

被引：42

作者：

Amani, Ali R. ^{[1
]}

机构：

[1] Islamic Azad Univ, Ayatollah Amoli Branch, Dept Phys, Fac Sci, Box 678, Amol, Iran

来源：

INTERNATIONAL JOURNAL OF MODERN PHYSICS D | 2016年 / 25卷 / 06期

关键词：

Bouncing cosmology; F(R) gravity; equation of state parameter; dark energy; HOLOGRAPHIC DARK ENERGY; QUINTOM MODEL; UNIVERSE; SUPERNOVAE; CONSTANT; STATE; FIELD;

D O I：

10.1142/S0218271816500711

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

In this paper, we study F(R) gravity by Hu-Sawicki model in Friedmann-Lemaiitre-Robertson-Walker (FLRW) background. The Friedmann equations are calculated by modified gravity action, and then the obtained Friedmann equations are written in terms of standard Friedmann equations. Next, the behavior of bouncing cosmology is investigated in the modified gravity model, i.e. this behavior can solve the problem of nonsingularity in standard big bang cosmology. We plot the cosmological parameters in terms of cosmic time and then the bouncing condition is investigated. In what follows, we reconstruct the modified gravity by redshift parameter, and also graphs of cosmological parameters are plotted in terms of redshift, in which the figures show us an accelerated expansion of universe. Finally, the stability of the scenario is investigated by a function as sound speed, and the graph of sound speed versus redshift shows us that there is the stability in late-time.

引用

页数：11

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