scholarly journals Curvaton and quantum gravity effect on the tensor-to-scalar ratio of the chaotic inflation

2021 ◽  
Vol 36 (28) ◽  
pp. 2150204
Author(s):  
P. K. Suresh
Keyword(s):  
Quantum Gravity ◽  
Early Universe ◽  
Gravity Effect ◽  
Ratio Estimate ◽  
Inflation Model ◽  
Quantum Gravity Effect ◽  
Single Field ◽  
Probe Measurements ◽  
Chaotic Inflation

The expected tensor-to-scalar ratio estimate of the upcoming CMB mission probe measurements may establish a lower value of the ratio than the currently obtained value. It can be described in terms of a single field chaotic inflation model along with the curvaton or quantum gravity or their combined effect. Consequently, the role of quantum gravity or curvaton in the dynamics of the early universe may not be ruled out. The curvaton scenario and quantum gravity effect can be tested experimentally. The upcoming CMB missions can validate the curvaton scenario and quantum gravity experimentally.

Gravitational analysis of neutral regular black hole in Rastall gravity

2020 ◽  
Vol 35 (27) ◽  
pp. 2050225 ◽  
Author(s):  
Riasat Ali ◽  
Muhammad Asgher ◽  
M. F. Malik
Keyword(s):  
Black Hole ◽  
Wave Equation ◽  
Quantum Gravity ◽  
Generalized Uncertainty Principle ◽  
Gravity Effect ◽  
Tunneling Radiation ◽  
Regular Black Hole ◽  
Quantum Gravity Effect ◽  
Stability And Instability ◽  
The Stability

This paper is devoted to the tunneling radiation and quantum gravity effect on tunneling radiation of neutral regular black hole in Rastall gravity. We analyzed the tunneling radiation and Hawking temperature of neutral regular black hole by applying the Hamilton-Jacobi ansatz phenomenon. Lagrangian wave equation have been investigated by generalized uncertainty principle (GUP), using the WKB-approximation and calculated the tunneling rate as well as temperature. Furthermore, we analyzed the temperature of this neutral regular black hole in the presence of gravity. The stability and instability of neutral regular black hole are also analyzed.

scholarly journals Will Quantum Cosmology Resurrect Chaotic Inflation Model?

2016 ◽  
Vol 43 ◽  
pp. 1660205 ◽  
Author(s):  
Sang Pyo Kim ◽  
Won Kim
Keyword(s):  
Wave Function ◽  
Quantum Cosmology ◽  
Quantum Corrections ◽  
Inflation Model ◽  
Starobinsky Model ◽  
Curvature Term ◽  
Single Field ◽  
Viable Model ◽  
De Broglie Bohm ◽  
Chaotic Inflation

The single field chaotic inflation model with a monomial power greater than one seems to be ruled out by the recent Planck and WMAP CMB data while Starobinsky model with a higher curvature term seems to be a viable model. Higher curvature terms being originated from quantum fluctuations, we revisit the quantum cosmology of the Wheeler-DeWitt equation for the chaotic inflation model. The semiclassical cosmology emerges from quantum cosmology with fluctuations of spacetimes and matter when the wave function is peaked around the semiclassical trajectory with quantum corrections a la the de Broglie-Bohm pilot theory.

scholarly journals Quantum gravity effect in torsion driven inflation and CP violation

2015 ◽  
Vol 2015 (10) ◽  
Author(s):  
Sayantan Choudhury ◽  
Barun Kumar Pal ◽  
Banasri Basu ◽  
Pratul Bandyopadhyay
Keyword(s):  
Cp Violation ◽  
Quantum Gravity ◽  
Gravity Effect ◽  
Quantum Gravity Effect

scholarly journals Quantum Gravity effect on the Quark-Gluon Plasma

2014 ◽  
Vol 2014 (1) ◽  
pp. 1-6 ◽  
Author(s):  
A. Tawfik ◽  
◽  
L. I. Abou-Salem ◽  
I. Elmashad ◽  
Jameel-Un Nabi ◽  
...  
Keyword(s):  
Quantum Gravity ◽  
Quark Gluon Plasma ◽  
Gluon Plasma ◽  
Gravity Effect ◽  
Quantum Gravity Effect

Black hole remnant and quantum tunneling corrections to the five-dimensional Myers–Perry black hole based on generalized uncertainty principle

2016 ◽  
Vol 94 (11) ◽  
pp. 1153-1157 ◽  
Author(s):  
Hui-Ling Li ◽  
Rong Lin
Keyword(s):  
Black Hole ◽  
Dirac Equation ◽  
Quantum Gravity ◽  
Quantum Tunneling ◽  
Generalized Uncertainty Principle ◽  
Tunneling Probability ◽  
Gravity Effect ◽  
Quantum Gravity Effect ◽  
Modified Dirac Equation ◽  
Black Hole Remnant

Taking into account quantum gravity effect influenced by the generalized uncertain principle (GUP), via modified Dirac equation, we discuss the quantum gravity correction to fermion tunneling and the remnant in a five-dimensional Myers–Perry black hole. By analyzing the modified tunneling probability, we find that the emission spectrum is no longer pure thermal. Furthermore, it is worth emphasizing that the quantum gravity correction influenced by GUP prevents the black hole from evaporating totally, resulting in a black hole remnant.

scholarly journals Quantum Gravity Effects in Cosmology

2018 ◽  
Vol 168 ◽  
pp. 03001
Author(s):  
Je-An Gu ◽  
Sang Pyo Kim ◽  
Che-Min Shen
Keyword(s):  
Power Spectrum ◽  
Quantum Gravity ◽  
Effective Temperature ◽  
Quantum Cosmology ◽  
Hawking Temperature ◽  
Gravity Effect ◽  
Probe Field ◽  
Quantum Gravity Effect ◽  
Gravity Effects ◽  
Spacetime Fluctuations

Within the geometrodynamic approach to quantum cosmology, we studied the quantum gravity effects in cosmology. The Gibbons-Hawking temperature is corrected by quantum gravity due to spacetime fluctuations and the power spectrum as well as any probe field will experience the effective temperature, a quantum gravity effect.

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