scholarly journals Inflation of universe by nonlinear electrodynamics

2020 ◽  
Vol 29 (15) ◽  
pp. 2050102
Author(s):  
S. I. Kruglov
Keyword(s):  
Spectral Index ◽  
Nonlinear Electrodynamics ◽  
Second Stage ◽  
Classical Stability ◽  
Dimensional Parameters ◽  
Wmap Data ◽  
Coulomb Law ◽  
Stochastic Magnetic Fields ◽  
The Universe ◽  
Universe Evolution

Nonlinear electrodynamics with two-dimensional parameters is studied. The range of electromagnetic fields, when principles of causality, unitarity and the classical stability hold, are obtained. A singularity of the electric field at the center of charges is absent within our model and there are corrections to the Coulomb law as [Formula: see text]. The universe inflation takes place in the background of stochastic magnetic fields. The second stage of the universe evolution is the radiation era so that the graceful exit exists. We estimated the spectral index, the tensor-to-scalar ratio, and the running of the spectral index that are in a rough accordance with the PLANCK and WMAP data.

scholarly journals Inflation of Universe by Nonlinear Electrodynamics

2020 ◽  
Author(s):  
Sergey Kruglov
Keyword(s):  
Spectral Index ◽  
Nonlinear Electrodynamics ◽  
Second Stage ◽  
Classical Stability ◽  
Dimensional Parameters ◽  
Wmap Data ◽  
Coulomb Law ◽  
Stochastic Magnetic Fields ◽  
The Universe ◽  
Universe Evolution

Nonlinear electrodynamics with two dimensional parameters is studied. The range of electromagnetic fields when principles of causality, unitarity and the classical stability hold are obtained. A singularity of the electric field at the center of charges is absent within our model and there are corrections to the Coulomb law as $r\rightarrow\infty$. The universe inflation takes place in the background of stochastic magnetic fields. The second stage of the universe evolution is the radiation era so that the graceful exit exists. We estimated the spectral index, the tensor-to-scalar ratio, and the running of the spectral index that are in an approximate agreement with the PLANK and WMAP data.

scholarly journals Inflation of universe due to nonlinear electrodynamics

2017 ◽  
Vol 32 (13) ◽  
pp. 1750071 ◽  
Author(s):  
S. I. Kruglov
Keyword(s):  
Minkowski Space ◽  
Electromagnetic Fields ◽  
Spectral Index ◽  
Nonlinear Electrodynamics ◽  
Gravitation Field ◽  
Dimensional Parameter ◽  
Minkowski Space Time ◽  
Wmap Data ◽  
Stochastic Magnetic Fields ◽  
The Universe

A model of nonlinear electrodynamics with a dimensional parameter [Formula: see text] is considered. Electromagnetic fields are the source of the gravitation field and inflation of the universe. We imply that the universe is filled by stochastic magnetic fields. It is demonstrated that after the universe inflation the universe decelerates approaching the Minkowski space–time. We evaluate the spectral index, the tensor-to-scalar ratio, and the running of the spectral index which approximately agree with the Planck and WMAP data.

scholarly journals Accelerating cosmologies with nonlinear electrodynamics

2018 ◽  
Vol 96 (9) ◽  
pp. 992-998
Author(s):  
G.P. Singh ◽  
N. Hulke ◽  
Ashutosh Singh
Keyword(s):  
Cosmological Model ◽  
Apparent Horizon ◽  
Second Law Of Thermodynamics ◽  
Big Bang ◽  
Accelerated Expansion ◽  
Nonlinear Electrodynamics ◽  
Classical Stability ◽  
Initial Anisotropy ◽  
The Big Bang ◽  
The Universe

In this paper, we consider the framework of nonlinear electrodynamics in locally rotationally symmetric (LRS) Bianchi-I universe model composed of magnetic fluid. It has been shown that an accelerated universe expansion takes place if the nonlinear electromagnetic field is a source of gravitational field. In this model, after the big bang, the universe undergoes inflation and the accelerated expansion, dissipates the initial anisotropy of the curvature part without using a selected initial condition. Further validity of generalised second law of thermodynamics in the cosmological model enclosed by apparent horizon is investigated. We also discuss the classical stability of the cosmological model and observational viability of the model.

scholarly journals Nonlinear electromagnetic fields as a source of universe acceleration

2016 ◽  
Vol 31 (11) ◽  
pp. 1650058 ◽  
Author(s):  
S. I. Kruglov
Keyword(s):  
Magnetic Field ◽  
Electromagnetic Fields ◽  
Spectral Index ◽  
Scale Factor ◽  
Gravitation Field ◽  
Dimensional Parameter ◽  
Classical Stability ◽  
Stochastic Magnetic Field ◽  
The Universe

A model of nonlinear electromagnetic fields with a dimensional parameter [Formula: see text] is proposed. From PVLAS experiment the bound on the parameter [Formula: see text] was obtained. Electromagnetic fields are coupled with the gravitation field and we show that the universe accelerates due to nonlinear electromagnetic fields. The magnetic universe is considered and the stochastic magnetic field is a background. After inflation the universe decelerates and approaches to the radiation era. The range of the scale factor, when the causality of the model and a classical stability take place, was obtained. The spectral index, the tensor-to-scalar ratio, and the running of the spectral index were estimated which are in approximate agreement with the Planck, WMAP, and BICEP2 data.

scholarly journals Rational nonlinear electrodynamics causes the inflation of the universe

2020 ◽  
Vol 35 (26) ◽  
pp. 2050168
Author(s):  
S. I. Kruglov
Keyword(s):  
Magnetic Fields ◽  
Electric Field ◽  
Electromagnetic Fields ◽  
Ricci Tensor ◽  
De Sitter Space ◽  
Nonlinear Electrodynamics ◽  
De Sitter ◽  
Number Formula ◽  
Stochastic Magnetic Fields ◽  
The Universe

The source of the universe inflation is electromagnetic fields obeying rational nonlinear electrodynamics proposed earlier. Within this model the singularities of the electric field at the center of charges, the Ricci scalar, the Ricci tensor squared and the Kretschmann scalar are absent. We consider the universe which is filled by stochastic magnetic fields. It is demonstrated that the inflation lasts approximately [Formula: see text] s with the reasonable [Formula: see text]-folding number [Formula: see text]. The inflation starts from de Sitter space–time and after the universe inflation end it decelerates approaching the radiation era.

scholarly journals Acceleration of universe by nonlinear electromagnetic fields

2016 ◽  
Vol 25 (11) ◽  
pp. 1640002 ◽  
Author(s):  
S. I. Kruglov
Keyword(s):  
Electromagnetic Fields ◽  
Spectral Index ◽  
Accelerated Expansion ◽  
Gravitation Field ◽  
Dimensional Parameter ◽  
Deceleration Phase ◽  
Classical Stability ◽  
Expansion Of The Universe ◽  
Stochastic Magnetic Field ◽  
The Universe

A new model of nonlinear electromagnetic fields possessing a dimensional parameter [Formula: see text] is proposed. Electromagnetic fields are considered as the source of the gravitation field and accelerated expansion of the universe is driven by nonlinear electromagnetic fields. We consider the magnetic universe and the stochastic magnetic field is a source of the universe acceleration. After the universe inflation and the accelerated expansion the universe decelerates. We show the causality of the model and a classical stability at the deceleration phase. The spectral index, the tensor-to-scalar ratio and the running of the spectral index were estimated that approximately fulfil the PLANCK, WMAP and BICEP2 data.

On the Origin of Four Pi in Physics

2016 ◽  
pp. 3994-4013
Author(s):  
Aaron Hanken
Keyword(s):  
Black Hole ◽  
Surface Area ◽  
Single Particles ◽  
Pythagorean Triples ◽  
Free Particles ◽  
Close Relationship ◽  
Dimensional Parameters ◽  
Gaussian Surface ◽  
Planck Energy ◽  
The Universe

We find the highest symmetry between the fields intrinsic to free particles (free particles having only mass, charge and spin), and show these fields symmetries and their close relationship to force and entropy. The Boltzmann Constant is equal to the natural entropy, in that it is The Planck Energy over The Planck Temperature. This completes a needed symmetry in The Bekenstein-Hawking Entropy. Upon substitution of Planck Units into The Schwarzschild Radius, we find that the mass and radius of any black hole define both the gravitational constant and the natural force. We find that the Gaussian Surface area about a particle is equal to the surface area of an equally massed black hole if we define the gravitational field of that particle to be the quotient of The Planck Force and the particles mass. By these simple substitutions we find that gravity is quantized in units of surface entropy. We also find Pythagorean Triples are resting within the dimensional parameters of Special Relativity, and show this to be the dimensional aspects of single particles observing one another, coupled with the intrinsic Hubble nature of the universe.

COSMOLOGICAL EFFECTS OF NONLINEAR ELECTRODYNAMICS

2005 ◽  
Vol 20 (11) ◽  
pp. 2421-2430 ◽  
Author(s):  
M. NOVELLO
Keyword(s):  
Nonlinear Electrodynamics ◽  
Global Properties ◽  
The Universe

We present some consequences induced by nonlinear electrodynamics on the global properties of the universe.

scholarly journals De Sitter and power-law solutions in non-local Gauss–Bonnet gravity

2018 ◽  
Vol 15 (11) ◽  
pp. 1850188 ◽  
Author(s):  
E. Elizalde ◽  
S. D. Odintsov ◽  
E. O. Pozdeeva ◽  
S. Yu. Vernov
Keyword(s):  
Power Law ◽  
Sufficient Conditions ◽  
Model Parameters ◽  
Local Form ◽  
De Sitter ◽  
Dynamical Equations ◽  
Non Local ◽  
Necessary And Sufficient ◽  
The Universe ◽  
Universe Evolution

The cosmological dynamics of a non-locally corrected gravity theory, involving a power of the inverse d’Alembertian, is investigated. Casting the dynamical equations into local form, the fixed points of the models are derived, as well as corresponding de Sitter and power-law solutions. Necessary and sufficient conditions on the model parameters for the existence of de Sitter solutions are obtained. The possible existence of power-law solutions is investigated, and it is proven that models with de Sitter solutions have no power-law solutions. A model is found, which allows to describe the matter-dominated phase of the Universe evolution.

Sign in / Sign up

Export Citation Format

Share Document