Limiting curvature mimetic gravity and its relation to Loop Quantum Cosmology

被引：15

作者：

de Haro, Jaume ^{[1
]}

Areste Salo, Llibert ^{[1
,2
]}

Pan, Supriya ^{[3
]}

机构：

[1] Univ Politecn Cataluna, Dept Matemat, Diagonal 647, E-08028 Barcelona, Spain

[2] Ludwig Maximilians Univ Munchen, Fak Phys, Theresienstr 37, D-80333 Munich, Germany

[3] Raiganj Surendranath Mahavidyalaya, Dept Math, Uttar Dinajpur 733134, W Bengal, India

来源：

GENERAL RELATIVITY AND GRAVITATION | 2019年 / 51卷 / 04期

关键词：

Loop Quantum Cosmology; Mimetic gravity; Cosmological perturbations; GRAVITATIONAL COLLAPSE; INFLATIONARY UNIVERSE; SINGULARITIES; FLATNESS; HORIZON;

D O I：

10.1007/s10714-019-2534-1

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Considering as usual that the underlying geometry of our universe is well described by the spatially flat Friedmann-Lemaitre-Robertson-Walker line element, we review how the background of holonomy corrected Loop Quantum Cosmology (LQC) could be obtained as a simple modified version of the mimetic gravity. We also analyze the scalar and tensor perturbations of this modified mimetic model, from which we find that at the level of tensor perturbations it is indistinguishable from General Relativity while at the level of scalar perturbations, the modified mimetic model, which has the same background as LQC, does not exhibit the same properties as LQC in the so-called deformed algebra approach.

引用

页数：14

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