Bounce inflation in f (T) cosmology: A unified inflaton-quintessence field

被引：82

作者：

Bamba, Kazuharu ^{[1
]}

Nashed, G. G. L. ^{[2
,3
,4
]}

El Hanafy, W. ^{[2
,4
]}

Ibraheem, Sh. K. ^{[2
,3
]}

机构：

[1] Fukushima Univ, Fac Symbiot Syst Sci, Div Human Support Syst, Fukushima 9601296, Japan

[2] British Univ Egypt, Ctr Theoret Phys, POB 43, Cairo 11837, Egypt

[3] Ain Shams Univ, Dept Math, Fac Sci, Cairo 11566, Egypt

[4] Cairo Univ, Egyptian Relat Grp, Giza 12613, Egypt

来源：

PHYSICAL REVIEW D | 2016年 / 94卷 / 08期

关键词：

MODIFIED GRAVITY; TELEPARALLEL EQUIVALENT; UNIVERSE; MODELS; ENERGY; RENORMALIZATION; FLATNESS; HORIZON; SPACE; SPIN;

D O I：

10.1103/PhysRevD.94.083513

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We investigate a bounce inflation model with a graceful exit into the Friedmann-Robertson-Walker (FRW) decelerated Universe within f(T)-gravity framework, where T is the torsion scalar in the teleparallelism. We study the cosmic thermal evolution, the model predicts a supercold universe during the precontraction phase, which is consistent with the requirements of the slow-roll models, while it performs a reheating period by the end of the contraction with a maximum temperature just below the grand unified theory (GUT) temperature. However, it matches the radiation temperature of the hot big bang at later stages. The equation-of-state due to the effective gravitational sector suggests that our Universe is self-accelerated by teleparallel gravity. We assume the matter component to be a canonical scalar field. We obtain the scalar field potential that is induced by the f(T) theory. The power spectrum of the model is nearly scale invariant. In addition, we show that the model unifies inflaton and quintessence fields in a single model. Also, we revisited the primordial fluctuations in f(T) bounce cosmology, to study the fluctuations that are produced at the precontraction phase.

引用

页数：23

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