Crossing the phantom boundary in f(R) modified gravity: Jordan vs. Einstein frames

被引：2
作者：
Bisabr, Y. [1 ]
机构：
[1] Shahid Rajaee Teacher Training Univ, Dept Phys, Tehran 16788, Iran
来源：
GRAVITATION & COSMOLOGY | 2012年 / 18卷 / 02期
关键词：
F R GRAVITY; COSMOLOGICAL EVOLUTION; QUINTESSENCE; EQUIVALENCE; CONSTRAINTS; INVARIANCE; CONSTANT; QUINTOM;
D O I：
10.1134/S020228931202003X
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We study the capability of f(R) gravity models to allow for crossing the phantom boundary in both Jordan and Einstein conformal frames. In the Einstein frame, these models are equivalent to Einstein gravity with a scalar field minimally coupled to gravity. This scalar degree of freedom appears as a quintessence field with a coupling to the matter sector. We investigate the evolution of the equation of state parameter for some cosmologically viable f(R) gravity models in both conformal frames. This investigation (beyond mere theoretical arguments) acts as an operational tool to distinguish the physical status of the two conformal frames. It shows that this status is not the same.
引用
收藏
页码：143 / 150
页数：8
相关论文
共 50 条
[41]   A model-independent method with phantom divide line crossing in Weyl-type f(Q,T) gravity [J].
Koussour, M. .
CHINESE JOURNAL OF PHYSICS, 2023, 83 :454-466
[42]   Friedmann model with viscous cosmology in modified f (R, T) gravity theory [J].
Singh, C. P. ;
Kumar, Pankaj .
EUROPEAN PHYSICAL JOURNAL C, 2014, 74 (10) :1-11
[43]   Reconstruction of modified f(R, T) gravity with perfect fluid cosmological models [J].
Singh, C. P. ;
Singh, Vijay .
GENERAL RELATIVITY AND GRAVITATION, 2014, 46 (04) :1-14
[44]   Cosmological model with variable deceleration parameter in f(R, T) modified gravity [J].
Tiwari, Rishi Kumar ;
Beesham, Aroonkumar ;
Shukla, Bhupendra .
INTERNATIONAL JOURNAL OF GEOMETRIC METHODS IN MODERN PHYSICS, 2018, 15 (07)
[45]   Closed time-like curves in f (R , A) modified gravity theory [J].
Ahmed, F. ;
de Souza, J. C. R. ;
Santos, A. F. .
NUCLEAR PHYSICS B, 2024, 1004
[46]   f (R ,delμ1R,...,delμ1...delμnR) theories of gravity in Einstein frame: A higher order modified Starobinsky inflation, model in the Palatini approach [J].
Cuzinatto, R. R. ;
de Melo, C. A. M. ;
Medeiros, L. G. ;
Pompeia, P. J. .
PHYSICAL REVIEW D, 2019, 99 (08)
[47]   The plane symmetric vacuum solutions of modified field equations in metric f(R) gravity [J].
Yavari, Morteza .
ASTROPHYSICS AND SPACE SCIENCE, 2013, 348 (01) :293-302
[48]   Reconstruction and stability of f(R,T) gravity with Ricci and modified Ricci dark energy [J].
Sharif, M. ;
Zubair, M. .
ASTROPHYSICS AND SPACE SCIENCE, 2014, 349 (01) :529-537
[49]   Effect of viscous generalized and modified Chaplygin gas on f(R, G, T ) gravity [J].
Mavoa, F. ;
Hova, H. ;
Ganiou, G. ;
Houndjo, S. ;
Ahloui, F. ;
Baffou, E. ;
Kanfon, A. D. .
INDIAN JOURNAL OF PHYSICS, 2023, 97 (07) :2247-2260
[50]   Modified Renyi Holographic Dark Energy (MRHDE) in f(R, T) Theory of Gravity [J].
Bharali, J. ;
Das, K. .
ASTROPHYSICS, 2021, 64 (04) :512-528
12345