Note on Dark Energy and Cosmic Transit in a scale-invariance cosmology
arXiv:2101.02053 · doi:10.1142/S0219887821500705
Abstract
In general, the laws of physics are not invariant under a change of scale. To find out whether the 'scale-invariance hypothesis' corresponds to nature or not, a careful examination to its implications is required. As a consequence, the scale-invariance cosmological models need to be carefully checked with many tests in order to confirm or disconfirm them. In this paper, three different toy models have been introduced in the framework of a scale-invariance cosmology to examine dark energy and cosmic transit. Although cosmic transit exists in the three models, the pressure stays always negative during cosmic evolution. In addition, there is always a singularity in the evolution of the equation of state parameter which is not suitable for a complete investigation of dark energy evolution. The undesirable features of the parameters have been discussed, and a comparison with other cosmological contexts has been done.
References in corpus (18)
- f(R,T) gravity
- Dark energy cosmology: the equivalent description via different theoretical models and cosmography tests
- Modified teleparallel gravity: inflation without inflaton
- Modified f(R) gravity consistent with realistic cosmology: from matter dominated epoch to dark energy universe
- Towards a Nonsingular Bouncing Cosmology
- Extended Gravity Cosmography
- A kinematical approach to dark energy studies
- Corrected Entropy-Area Relation and Modified Friedmann Equations
- From inflation to dark energy in the non-minimal modified gravity
- High-redshift cosmography: auxiliary variables versus Padé polynomials
- Precision cosmology with Padé rational approximations: theoretical predictions versus observational limits
- Dynamics of Logamediate Inflation
- Model-independent limits and constraints on extended theories of gravity from cosmic reconstruction techniques
- An alternative to the LCDM model: the case of scale invariance
- A Cyclic Universe With Varying Cosmological Constant in gravity
- Scale-Invariant Dynamics of Galaxies, MOND, Dark Matter, and the Dwarf Spheroidals
- Gaugino condensation in an improved heterotic M-theory
- Cosmological determination to the values of the prefactors in the logarithmic corrected entropy-area relation