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Scaling solutions for dilaton quantum gravity

Physics Letters B, 2017
Scaling solutions for the effective action in dilaton quantum gravity are investigated within the functional renormalization group approach. We find numerical solutions that connect ultraviolet and infrared fixed points as the ratio between scalar field ...
T. Henz, J.M. Pawlowski, C. Wetterich
doaj   +1 more source

Quantum Cosmology of Quadratic f(R) Theories with a FRW Metric

Advances in Mathematical Physics, 2017
We study the quantum cosmology of a quadratic fR theory with a FRW metric, via one of its equivalent Horndeski type actions, where the dynamic of the scalar field is induced.
V. Vázquez-Báez, C. Ramírez
doaj   +1 more source

An open system approach to gravity

Journal of High Energy Physics
Several major open problems in cosmology — including the nature of inflation, dark matter, and dark energy — share a common structure: they involve spacetime-filling media with unknown microphysics, and can be probed so far only through their ...
Santiago Agüí Salcedo, Thomas Colas, Lennard Dufner, Enrico Pajer   +3 more
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The Principle of Phase Transition Cosmology: The Current Universe Formed by the Evolution of Two-Component Quantum Superfluid

Reports in Advances of Physical Sciences
This paper aims to demonstrate that modern cosmology has overlooked the systematic and holistic aspects of the universe’s evolution. It is based on the notion that the primordial universe comprised a two-component quantum superfluid and a synthesis of ...
Xiaodong Yang, Yuchen Yang, Zhen Luo, Yuanbo Bi   +3 more
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The Spectre of Underdetermination in Modern Cosmology

Philosophy of Physics
The scientific status of physical cosmology has been the subject of philosophical debate ever since detailed mathematical models of the universe emerged from Einstein’s general theory of relativity.
Pedro G. Ferreira, William J. Wolf, James Read   +2 more
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(Lovelock)2 inflation: Explaining the ACT data and equivalence to Higgs–Gauss–Bonnet inflation

Physics Letters B
We revisit the Starobinsky model of inflation in light of recent data from the Atacama Cosmology Telescope (ACT), which indicates a potential preference for a slightly larger scalar spectral index ns than predicted by the standard R2 scenario.
Andrea Addazi, Yermek Aldabergenov, Daulet Berkimbayev, Yifu Cai   +3 more
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Inflation at the End of 2025: Constraints on $r$ and $n_s$ Using the Latest CMB and BAO Data

The Open Journal of Astrophysics
Inflation elegantly provides initial conditions for the standard model of cosmology, while solving the horizon, flatness, and magnetic monopole problems. Inflationary models make predictions for the tensor-to-scalar ratio $r$ and the spectral index $n_s$
Lennart Balkenhol, E. Camphuis, F. Finelli, K. Benabed, F. R. Bouchet, J. Carron, S. Galli, E. Hivon, A. R. Khalife, L. Knox, C. L. Reichardt, A. Vitrier, W. L. K. Wu   +12 more
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Eternal Inflation and the Hermeneutics of the Infinite: Interpreting Cosmology at the Edge of Meaning

Философия и космология
The theory of eternal inflation — according to which our observable universe is just one bubble within an endlessly self-replicating multiverse — presents not only a physical but also a hermeneutic challenge.
Heitor Matallo Jr1
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Geometrothermodynamic Cosmology. [PDF]

Entropy (Basel), 2023
Luongo O, Quevedo H.
europepmc   +1 more source

Stability Properties of Geometrothermodynamic Cosmological Models. [PDF]

Entropy (Basel), 2023
Beissen N, Abishev M, Khassanov M, Aitassov T, Mamatova S, Toktarbay S.   +5 more
europepmc   +1 more source