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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, Emanuel W. de Oliveira Costa, Paulo Moniz, Shahram Jalalzadeh   +3 more
doaj   +4 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, Meysam Motaharfar, Rudnei O. Ramos   +2 more
doaj   +2 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

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

Cosmic Inflation, Quantum Information and the Pioneering Role of John S Bell in Cosmology [PDF]

Universe, 2019
According to the theory of cosmic inflation, the large scale structures observed in our Universe (galaxies, clusters of galaxies, Cosmic Background Microwave—CMB—anisotropy…) are of quantum mechanical origin. They are nothing but vacuum
Jérôme Martin
doaj   +2 more sources

Inflation in Gauss-Bonnet Brane Cosmology [PDF]

, 2003
The effect of including a Gauss-Bonnet contribution in the bulk action is investigated within the context of the steep inflationary scenario. When inflation is driven by an exponential inflaton field, this Gauss-Bonnet term allows the spectral index of ...
A. A. Starobinsky, A. A. Starobinsky, A. Albrecht, A. D. Linde, A. D. Linde, A. D. Linde, A. Fayyazuddin, A. H. Guth, A. H. Guth, A. Lukas, A. Lukas, A. Sen, A. Sen, A. Sen, B. Abdesselam, B. Zwiebach, C. Charmousis, C. Cśaki, C. Germani, D. G. Boulware, D. Ida, D. Langlois, D. Wands, E. E. Flanagan, E. F. Bunn, E. F. Bunn, E. I. Guendelman, E. J. Copeland, E. Witten, G. F. Giudice, G. Huey, G. Huey, G. Kofinas, G. T. Horowitz, I. Antoniadis, I. Low, I. P. Neupane, I. P. Neupane, J. E. Kim, J. E. Kim, J. E. Kim, J. E. Kim, J. E. Lidsey, J. E. Lidsey, J. E. Lidsey, J. E. Lidsey, J. M. Bardeen, J. M. Cline, J. M. Maldacena, James E. Lidsey, K. A. Meissner, L. Anchordoqui, L. Randall, L. Randall, M. Gasperini, M. Giovannini, M. Gogberashvili, M. Quevedo, M. Visser, N. Arkani-Hamed, N. Deruelle, N. Deruelle, N. Deruelle, N. E. Mavromatos, N. Goheer, N. J. Nunes, N. J. Nunes, O. Aharony, O. Aharony, O. Corradini, P. Binetruy, P. Binétruy, P. Binétruy, P. Hořava, P. Hořava, P. Kraus, R. C. Myers, R. G. Cai, R. Maartens, R. R. Metsaev, S. C. Davis, S. Gubser, S. Gubser, S. Mukohyama, S. Nojiri, S. Nojiri, S. Nojiri, S. Nojiri, S. Nojiri, S. Nojiri, S. W. Hawking, S. W. Hawking, S. W. Hawking, T. Barreiro, T. Shiromizu, V. A. Rubakov, V. Mukhanov, V. Sahni, Y. M. Cho   +98 more
core   +4 more sources

Inflationary Cosmology in Modified Gravity Theories

Symmetry, 2015
We review inflationary cosmology in modified gravity such as $R^2$ gravity with its extensions in order to generalize the Starobinsky inflation model. In particular, we explore inflation realized by three kinds of effects: modification of gravity, the ...
Sergei D Odintsov
exaly   +4 more sources

Precision cosmology and the stiff-amplified gravitational-wave background from inflation: NANOGrav, Advanced LIGO-Virgo and the Hubble tension [PDF]

Journal of Cosmology and Astroparticle Physics, 2021
The recent NANOGrav finding of a common-spectrum process has invited interpretations as possible evidence of a primordial stochastic gravitational-wave background (SGWB) stronger than predicted by standard inflation + ΛCDM.
Bohua Li, P. Shapiro
semanticscholar   +1 more source

G-bounce inflation: towards nonsingular inflation cosmology with galileon field [PDF]

Journal of High Energy Physics, 2015
A bstractWe study a nonsingular bounce inflation model, which can drive the early universe from a contracting phase, bounce into an ordinary inflationary phase, followed by the reheating process.
Taotao Qiu, Yu-tong Wang
semanticscholar   +2 more sources

Early and late universe holographic cosmology from a new generalized entropy

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, Sergei D. Odintsov, Tanmoy Paul   +2 more
doaj   +1 more source