Reconstructing mimetic cosmology
نویسندگان
چکیده
We explore the mimetic gravity formulation with inclusion of a scalar field potential namely, $V(\phi)$. However, we are not considering any {\it priori} specific form this term. By means Chevallier-Polarski-Linder parametrization for parameter state fluid can construct an explicit function such in terms cosmological redshift and obtain analytical solutions approach. revise some implications these results additionally perform numerical reconstruction $V$ as field, $\phi$.
منابع مشابه
Reconstructing the Distortion Function for Nonlocal Cosmology
We consider the cosmology of modified gravity models in which Newton’s constant is distorted by a function of the inverse d’Alembertian acting on the Ricci scalar. We derive a technique for choosing the distortion function so as to fit an arbitrary expansion history. This technique is applied numerically to the case of ΛCDM cosmology, and the result agrees well with a simple hyperbolic tangent....
متن کاملCosmology ?
It is postulated that the action of the FRW-universe is the cos-mological term of Einstein's theory (no curvature term-" R 0 Cos-mology "). The expansion equation emerging from the embedding of this most simple brane world with variable speed of light is deduced. The universal dimensionless coupling constant of gravity is addressed. Some implications on the deep problems of cosmology are discus...
متن کاملReconstructing the Triaxial Shapes of Dark Matter Halos from the Anisotropic Spatial Distributions of their Substructures in the Concordance Cosmology
We develop an algorithm to reconstruct the triaxial shapes of dark matter halos from the anisotropic spatial distributions of their substructures for the concordance background cosmology. First, we construct an analytic model for the anisotropic spatial distribution of dark halo substructures under the assumption that the tidal field with non-zero trace in the triaxial mass distribution of the ...
متن کاملString Cosmology versus Standard and Inflationary Cosmology
This paper presents a review of the basic, model-independent differences between the pre-big bang scenario, arising naturally in a string cosmology context, and the standard inflationary scenario. We use an unconventional approach in which the introduction of technical details is avoided as much as possible, trying to focus the reader’s attention on the main conceptual aspects of both scenarios...
متن کاملCosmology: The Noncommutative Quantum and Classical Cosmology
During the early days of quantum mechanics and quantum field theory, continuous space-time and Lorentz symmetry was considered inappropriate to describe the small scale structure of the universe. It was also argued that one should introduce a fundamental length scale, limiting the precision of position measurements. The introduction of fundamental length is suggested to cure the ultraviolet div...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Physics of the Dark Universe
سال: 2021
ISSN: ['2212-6864']
DOI: https://doi.org/10.1016/j.dark.2021.100775