Results 1 to 10 of about 435,843 (210)
Inflation and Fractional Quantum Cosmology [PDF]
Fractal and Fractional, 2022 The Wheeler–DeWitt equation for a flat and compact Friedmann–Lemaître–Robertson–Walker cosmology at the pre-inflation epoch is studied in the contexts of the standard and fractional quantum cosmology.
Seyed Meraj Mousavi Rasouli +3 more
doaj +4 more sources
The Warm Inflation Story [PDF]
Universe, 2023 Warm inflation has normalized two ideas in cosmology, that in the early universe the initial primordial density perturbations generally could be of classical rather than quantum origin and that during inflation, particle production from interactions ...
Arjun Berera
doaj +2 more sources
Recent Developments in Warm Inflation [PDF]
Universe, 2023 Warm inflation, its different particle physics model implementations, and the implications of dissipative particle production for its cosmology are reviewed.
Vahid Kamali +2 more
doaj +2 more sources
Early and late universe holographic cosmology from a new generalized entropy [PDF]
Physics Letters B, 2022 We propose a new four-parameter entropy function that generalizes the Tsallis, Rényi, Barrow, Sharma-Mittal, Kaniadakis and Loop Quantum Gravity entropies for suitable limits of the parameters.
Shin'ichi Nojiri +2 more
doaj +2 more sources
Cosmology without inflation [PDF]
Physical Review D, 2008 We propose a new cosmological paradigm in which our observed expanding phase is originated from an initially large contracting Universe that subsequently experienced a bounce.
A. Ashtekar +7 more
core +3 more sources
Inflation in loop quantum cosmology [PDF]
Physical Review D, 2018 We develop a consistent analytic approach to determine the conditions under which slow roll inflation can arise when the inflaton is the same scalar field that is responsible for the bounce in Loop Quantum Cosmology (LQC).
A. Bhardwaj, E. Copeland, J. Louko
semanticscholar +4 more sources
Inflation in the Rényi cosmology [PDF]
Modern Physics Letters A, 2019 The description of the accelerated phases for the current and primordial cosmos has been obtained in the framework of Rényi cosmology. The results show that corrections to the Friedmann equations, originated from differences between Rényi and Bekenstein ...
H. Moradpour +3 more
semanticscholar +4 more sources
Inflation in Multidimensional Quantum Cosmology [PDF]
Physical Review D, 1995 We extend to multidimensional cosmology Vilenkin's prescription of tunnelling from nothing for the quantum origin of the observable Universe. Our model consists of a $D+4$-dimensional spacetime of topology ${\cal R}\times {\cal S}^3 \times{\cal S}^D ...
A. D. Linde +28 more
core +5 more sources
Inflation and String Cosmology [PDF]
International Journal of Modern Physics A, 2005 After 25 years of its existence, inflationary theory gradually becomes the standard cosmological paradigm. However, we still do not know which of the many versions of inflationary cosmology will be favored by the future observational data.
Linde, Andrei
core +5 more sources
Constraining barrow entropy-based cosmology with power-law inflation [PDF]
European Physical Journal C: Particles and Fields, 2023 We study the inflationary era of the Universe in a modified cosmological scenario based on the gravity-thermodynamics conjecture with Barrow entropy instead of the usual Bekenstein–Hawking one.
G. G. Luciano
doaj +2 more sources