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Is cosmological data suggesting a nonminimal coupling between matter and gravity?
Miguel Barroso Varela, Orfeu Bertolami
Theoretical predictions from a modified theory of gravity with a nonminimal coupling between matter and curvature are compared to data from recent cosmological surveys. We use type…
Extended Weyl-Wigner phase-space framework for non-linear systems: typical and modified prey-predator-like dynamics
Alex E. Bernardini, Orfeu Bertolami
The extension of the phase-space Weyl-Wigner quantum mechanics to the subset of Hamiltonians in the form of (with replacing single contrib…
Phase-space gaussian ensemble quantum camouflage
Alex E. Bernardini, Orfeu Bertolami
Extending the phase-space description of the Weyl-Wigner quantum mechanics to a subset of non-linear Hamiltonians in position and momentum, gaussian functions are identified as the…
Gravitational wave polarizations in nonminimally coupled gravity
Miguel Barroso Varela, Orfeu Bertolami
The properties of metric perturbations are determined in the context of an expanding Universe governed by a modified theory of gravity with a non-minimal coupling between curvature…
Gravitational waves from a curvature-induced phase transition of a Higgs-portal dark matter sector
Andreas Mantziris, Orfeu Bertolami
The study of interactions between dark matter and the Higgs field opens an exciting connection between cosmology and particle physics, since such scenarios can impact the features…
Hubble tension in a nonminimally coupled curvature-matter gravity model
Miguel Barroso Varela, Orfeu Bertolami
The presently open problem of the Hubble tension is shown to be removed in the context of a modified theory of gravity with a non-minimal coupling between curvature and matter. By…
Time Crystals and Phase-Space Noncommutative Quantum Mechanics
Orfeu Bertolami, A. E. Bernardini
We argue that time crystal properties naturally arise from phase-space noncommutative quantum mechanics. In order to exemplify our point we consider the 2-dimensional noncommutativ…
The de Sitter swampland conjectures in the context of Chaplygin-inspired inflation
Orfeu Bertolami, Robertus Potting, Paulo M. Sá
In this work, we discuss the de Sitter swampland conjectures in the context of the generalized Chaplygin-inspired inflationary model. We demonstrate that these conjectures can be s…
Cooling the Earth with filled containers in space
Orfeu Bertolami, Clovis Jacinto de Matos
We argue that geostationary (GEO) reflective containers filled with could be used as shading devices to selectively cool areas on Earth's surface. This proposal would be an…