New modified mimetic gravity

被引:48
|
作者
Momeni, Davood [1 ]
Altaibayeva, Aziza
Myrzakulov, Ratbay
机构
[1] Eurasian Natl Univ, Eurasian Int Ctr Theoret Phys, Astana 010008, Kazakhstan
关键词
Modified gravity; torsion; cosmology; ENERGY CONDITIONS; ACCELERATING UNIVERSE; EXTENDED THEORIES; COSMOLOGY; QUANTUM;
D O I
10.1142/S0219887814500911
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
A modified Mimetic gravity (MMG) is proposed as a generalization of general relativity. The model contains a physical metric which is the function of an auxiliary (unphysical) metric and a Lyra's metric. We construct different kinds of conformally invariant models in different levels of the expansion parameter.. This model phenomenologically has been extended to higher-order forms. Cosmology of a certain class of such models has been investigated in detail. A cosmological solution has been proposed in inhomogeneous form of scalar field. For homogeneous case, energy conditions are widely investigated. We have shown that the system evaluated at intervals shorter than a certain time Tc meets all the energy conditions.
引用
收藏
页数:13
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