scholarly journals Curvaton reheating and intermediate inflation in brane cosmology

2011 ◽  
Vol 89 (10) ◽  
pp. 1015-1021
Author(s):  
Hossein Farajollahi ◽  
Arvin Ravanpak
Keyword(s):  
High Energy ◽  
Brane World ◽  
Model Parameters ◽  
Inflationary Universe ◽  
Brane Cosmology ◽  
Cosmological Constraints ◽  
Energy Regime ◽  
High Energy Regime ◽  
The Universe ◽  
Physical Quantities

In this paper, we study the curvaton reheating mechanism for an intermediate inflationary universe in brane world cosmology. In contrast to our previous work, we assume that when the universe enters the kination era, it is still in the high-energy regime. We then discuss, in detail, the new cosmological constraints on both the model parameters and the physical quantities.

scholarly journals Evolution of gravitational waves in the high-energy regime of brane-world cosmology

2005 ◽  
Vol 609 (1-2) ◽  
pp. 133-142 ◽  
Author(s):  
Takashi Hiramatsu ◽  
Kazuya Koyama ◽  
Atsushi Taruya
Keyword(s):  
Gravitational Waves ◽  
High Energy ◽  
Brane World ◽  
Energy Regime ◽  
High Energy Regime

scholarly journals CROSSING THE PHANTOM DIVIDE WITH k-ESSENCE IN BRANEWORLDS

2010 ◽  
Vol 25 (29) ◽  
pp. 2469-2481 ◽  
Author(s):  
LUIS P. CHIMENTO ◽  
MÓNICA FORTE ◽  
MARTÍN G. RICHARTE
Keyword(s):  
Equation Of State ◽  
High Energy ◽  
Chaplygin Gas ◽  
Energy Conditions ◽  
De Sitter ◽  
Effective Equation ◽  
Phantom Divide ◽  
Energy Regime ◽  
High Energy Regime ◽  
Stable Stage

We study a flat three-brane in the presence of a linear k field with nonzero cosmological constant Λ4. In this model the crossing of the phantom divide (PD) occurs when the k-essence energy density becomes negative. We show that in the high energy regime the effective equation of state has a resemblance of a modified Chaplygin gas while in the low energy regime it becomes linear. We find a scale factor that begins from a singularity and evolves to a de Sitter stable stage while other solutions have a super-accelerated regime and end with a big rip. We use the energy conditions to show when the effective equation of state of the brane-universe crosses the PD.

scholarly journals A non-perturbative exploration of the high energy regime in $$N_{\mathrm{f}}=3$$ N f = 3 QCD

2018 ◽  
Vol 78 (5) ◽  
Author(s):  
Mattia Dalla Brida ◽  
Patrick Fritzsch ◽  
Tomasz Korzec ◽  
Alberto Ramos ◽  
Stefan Sint ◽  
...  
Keyword(s):  
High Energy ◽  
Energy Regime ◽  
High Energy Regime

scholarly journals The curvaton scenario in brane cosmology: model parameters and their constraints

2010 ◽  
Vol 88 (12) ◽  
pp. 939-945 ◽  
Author(s):  
Hossein Farajollahi ◽  
Arvin Ravanpak
Keyword(s):  
Brane World ◽  
Model Parameters ◽  
Brane Cosmology ◽  
Inflationary Scenario

We have studied the curvaton scenario in brane world cosmology in an intermediate inflationary scenario. This approach has allowed us to find some constraints on different parameters that appear in the model.

scholarly journals A quantum window onto early inflation

2017 ◽  
Vol 26 (12) ◽  
pp. 1743025 ◽  
Author(s):  
Robert J. Hardwick ◽  
Vincent Vennin ◽  
David Wands
Keyword(s):  
Early Universe ◽  
High Energy ◽  
Quantum Corrections ◽  
Classical Dynamics ◽  
Energy Regime ◽  
Inflationary Phase ◽  
High Energy Regime

Inflation in the early universe is one of the most promising probes of gravity in the high-energy regime. However, observable scales give access to a limited window in the inflationary dynamics. In this paper, we argue that quantum corrections to the classical dynamics of cosmological fields allow us to probe much earlier epochs of the inflationary phase and extend this window by many orders of magnitude. We point out that both the statistics of cosmological fluctuations at observable scales, and the field displacements acquired by spectator fields that play an important role in many post-inflationary processes, are sensitive to a much longer phase of the inflationary epoch.

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