Quantum Accelerating Universe

2019 ◽  
pp. 545-605
Author(s):  
PedroF. González-Díaz ◽  
Alberto Rozas-Fernández
Keyword(s):  
Accelerating Universe

scholarly journals Action principle for action-dependent Lagrangians toward nonconservative gravity: Accelerating universe without dark energy

2017 ◽  
Vol 95 (10) ◽  
Author(s):  
Matheus J. Lazo ◽  
Juilson Paiva ◽  
João T. S. Amaral ◽  
Gastão S. F. Frederico
Keyword(s):  
Dark Energy ◽  
Action Principle ◽  
Accelerating Universe

scholarly journals MODIFIED GRAVITY AS A COMMON CAUSE FOR COSMIC ACCELERATION AND FLAT GALAXY ROTATION CURVES

2012 ◽  
Vol 21 (11) ◽  
pp. 1242002 ◽  
Author(s):  
PRITI MISHRA ◽  
TEJINDER P. SINGH
Keyword(s):  
Dark Matter ◽  
Dark Energy ◽  
Cosmic Acceleration ◽  
Accelerating Universe ◽  
Rotation Curves ◽  
Common Cause ◽  
Order Of Magnitude ◽  
Flat Rotation Curves ◽  
Acceleration Of The Universe ◽  
Galaxy Rotation Curves

Flat galaxy rotation curves and the accelerating Universe both imply the existence of a critical acceleration, which is of the same order of magnitude in both the cases, in spite of the galactic and cosmic length scales being vastly different. Yet, it is customary to explain galactic acceleration by invoking gravitationally bound dark matter, and cosmic acceleration by invoking a "repulsive" dark energy. Instead, might it not be the case that the flatness of rotation curves and the acceleration of the Universe have a common cause? In this essay we propose a modified theory of gravity. By applying the theory on galactic scales we demonstrate flat rotation curves without dark matter, and by applying it on cosmological scales we demonstrate cosmic acceleration without dark energy.

scholarly journals Eternally accelerating universe without event horizon

2001 ◽  
Vol 522 (3-4) ◽  
pp. 211-214 ◽  
Author(s):  
Pedro F González-Dı́az
Keyword(s):  
Event Horizon ◽  
Accelerating Universe

scholarly journals The fate of black holes in an accelerating universe

2004 ◽  
Vol 589 (3-4) ◽  
pp. 78-82 ◽  
Author(s):  
Pedro F. González-Dı́az ◽  
Carmen L. Sigüenza
Keyword(s):  
Black Holes ◽  
Accelerating Universe

scholarly journals Holographic cosmology with two coupled fluids in the presence of viscosity

2021 ◽  
pp. 2150149
Author(s):  
I. Brevik ◽  
A. V. Timoshkin
Keyword(s):  
Dark Matter ◽  
Dark Energy ◽  
Holographic Dark Energy ◽  
Exponential Model ◽  
Point Of View ◽  
Accelerating Universe ◽  
Late Time ◽  
Conservation Of Energy ◽  
Analytical Expressions ◽  
Friedmann Robertson Walker

We explore the cosmological models of the late-time universe based on the holographic principle, taking into account the properties of the viscosity of the dark fluid. We use the mathematical formalism of generalized infrared cutoff holographic dark energy, as presented by Nojiri and Odintsov [Covariant generalized holographic dark energy and accelerating universe, Eur. Phys. J. C 77 (2017) 528]. We consider the Little Rip, the Pseudo Rip, and a bounce exponential model, with two interacting fluids, namely dark energy and dark matter in a spatially-flat Friedmann–Robertson–Walker universe. Within these models, analytical expressions are obtained for infrared cutoffs in terms of the particle horizons. The law of conservation of energy is presented, from a holographic point of view.

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