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A non-singular cosmology is derived in modified gravity (MOG) with a varying gravitational coupling strength $G(t)=G_N\xi(t)$. Assuming that the curvature $k$, the cosmological constant $\Lambda$ and $\rho$ vanish at $t=0$, we obtain a…

广义相对论与量子宇宙学 · 物理学 2007-10-24 J. W. Moffat

We give the correct interpretation of the new metric, found lately by the author. This metric results as an exact solution of the Einstein field equations, without the cosmological constant. The new feature is the introduction, from the…

综合物理 · 物理学 2007-05-23 Evangelos Chaliasos

Old and new puzzles of cosmology are reexamined from the point of view of quantum theory of the universe developed here. It is shown that in proposed approach the difficulties of the standard cosmology do not arise. The theory predicts the…

广义相对论与量子宇宙学 · 物理学 2007-05-23 V. E. Kuzmichev , V. V. Kuzmichev

General relativistic entropic acceleration theory may explain the present cosmic acceleration from first principles without the need of introducing a cosmological constant. Following the covariant formulation of non-equilibrium phenomena in…

广义相对论与量子宇宙学 · 物理学 2021-10-20 Juan Garcia-Bellido , Llorenc Espinosa-Portales

In this work, we review the results of Refs [1]-[5] dedicated to the description of the early Universe cosmology induced by quantum and thermal effects in superstring theories. The present evolution of the Universe is described very…

高能物理 - 理论 · 物理学 2021-01-05 F. Bourliot , J. Estes , C. Kounnas , H. Partouche

Both from gravitational (G) experiments and from a new theoretical approach based on a particle model it is proved that the classical invariability of the bodies, after a change of relative rest-position with respect to other bodies, it is…

广义相对论与量子宇宙学 · 物理学 2007-05-23 Rafael A. Vera

Considering our expanding universe as made up of gravitationally interacting particles which describe particles of luminous matter and dark matter and dark energy which is described by a repulsive harmonic potential among the points in the…

综合物理 · 物理学 2009-11-13 Subodha Mishra

First the fluctuation energy is derived from the adiabatic random fluctuations due to the second-order perturbation theory, and the evolutionary relation for it is expressed in the form of rho_f = rho_f (rho), where rho and rho_f are the…

广义相对论与量子宇宙学 · 物理学 2017-09-12 Kenji Tomita

The problem of the physical nature and the cosmological constant genesis is discussed. This problem can't be solved in terms of the current quantum field theory which operates with Higgs and nonperturbative vacuum condensates and takes into…

天体物理学 · 物理学 2007-05-23 Vladimir Burdyuzha , Olga Lalakulich , Yuri Ponomarev , Grigory Vereshkov

Cosmology is undergoing an explosive period of activity, fueled both by new, accurate astrophysical data and by innovative theoretical developments. Cosmological parameters such as the total density of the Universe and the rate of…

天体物理学 · 物理学 2007-05-23 A. S. Sakharov , H. Hofer

Over the past three years we have determined the basic features of the Universe -- spatially flat; accelerating; comprised of 1/3 a new form of matter, 2/3 a new form of energy, with some ordinary matter and a dash of massive neutrinos; and…

天体物理学 · 物理学 2009-11-07 Michael S. Turner

Despite all fundamental objections against Newtonian concepts in cosmology, the Friedmann equation derives from these in an astoundingly simple way through application of the shell theorem and conservation of Newtonian energy in an infinite…

广义相对论与量子宇宙学 · 物理学 2017-04-05 Herman Telkamp

The traditional "explanation" for the observed acceleration of the universe is the existence of a positive cosmological constant. However, this can hardly be a truly convincing explanation, as an expanding universe is not expected to have a…

广义相对论与量子宇宙学 · 物理学 2015-06-22 Joan Sola

Dark energy and dark matter constitute 95% of the observable Universe. Yet the physical nature of these two phenomena remains a mystery. Einstein suggested a long-forgotten solution: gravitationally repulsive negative masses, which drive…

综合物理 · 物理学 2018-12-05 J. S. Farnes

By means of the experimental result on the present equipartition between background microwave radiation energy and that of the interstellar magnetic field, and by advancing a Machian relation for the magnetic field, which, differently than…

综合物理 · 物理学 2007-05-23 Marcelo Samuel Berman

In this paper we have given a generalisation of the earlier work by Prigogine et al. who have constructed a phenomenological model of entropy production via particle creation in the very early universe generated out of the vacuum rather…

广义相对论与量子宇宙学 · 物理学 2015-06-05 G. K. Goswami , Mandwi Trivedi

I describe an approach which connects classical gravity with the quantum microstructure of spacetime. The field equations arise from maximizing the density of states of matter plus geometry. The former is identified using the thermodynamics…

广义相对论与量子宇宙学 · 物理学 2017-08-25 T. Padmanabhan

The cosmological constant, which was introduced by Einstein a century ago to allow for a static universe, experienced a revival two decades ago under the label dark energy as a parameter to model the observed accelerated expansion of the…

综合物理 · 物理学 2019-01-08 Jan O. Stenflo

It is shown that Einstein field equations give two solutions for cosmology. The first one is the standard well known representative of the present status of cosmology. We identify it with the local point of view of a flat Universe with the…

综合物理 · 物理学 2008-01-04 Antonio Alfonso-Faus

The effect of the global rotation of the universe on the formation of galaxies is investigated. It is found that the global rotation provides a natural origin for the rotation of galaxies, and the morphology of the objects formed from…

天体物理学 · 物理学 2015-06-24 Li-Xin Li