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
相关论文
共 50 条
  • [1] New anisotropic star solutions in mimetic gravity
    G. G. L. Nashed
    Emmanuel N. Saridakis
    The European Physical Journal Plus, 138
  • [2] Embedding theory as new geometrical mimetic gravity
    Paston, S. A.
    Sheykin, A. A.
    EUROPEAN PHYSICAL JOURNAL C, 2018, 78 (12):
  • [3] New anisotropic star solutions in mimetic gravity
    Nashed, G. G. L.
    Saridakis, Emmanuel N.
    EUROPEAN PHYSICAL JOURNAL PLUS, 2023, 138 (04):
  • [4] Embedding theory as new geometrical mimetic gravity
    S. A. Paston
    A. A. Sheykin
    The European Physical Journal C, 2018, 78
  • [5] Multifield mimetic gravity
    Mansoori, Seyed Ali Hosseini
    Talebian, Alireza
    Molaee, Zahra
    Firouzjahi, Hassan
    PHYSICAL REVIEW D, 2022, 105 (02)
  • [6] Mimetic Horava gravity
    Chamseddine, Ali H.
    Mukhanov, Viatcheslav
    Russ, Tobias B.
    PHYSICS LETTERS B, 2019, 798
  • [7] Modified Gauss-Bonnet gravity with the Lagrange multiplier constraint as mimetic theory
    Astashenok, Artyom V.
    Odintsov, Sergei D.
    Oikonomou, V. K.
    CLASSICAL AND QUANTUM GRAVITY, 2015, 32 (18)
  • [8] Higher derivative mimetic gravity
    Gorji, Mohammad Ali
    Mansoori, Seyed Ali Hosseini
    Firouzjahi, Hassan
    JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS, 2018, (01):
  • [9] Neutron stars in mimetic gravity
    Noshad, Hajar
    Hendi, Seyed Hossein
    Panah, Behzad Eslam
    EUROPEAN PHYSICAL JOURNAL C, 2022, 82 (05):
  • [10] Mimetic Weyl geometric gravity
    Visa, Daria-Ioana
    Harko, Tiberiu
    Shahidi, Shahab
    PHYSICS OF THE DARK UNIVERSE, 2024, 46