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European Physical Journal C: Particles and Fields, 2018 Bouncing cosmologies are obtained by adding to the Einstein–Hilbert action a term of the form $$\sqrt{-\,g}f(\chi )$$ -gf(χ) , with $$\chi $$ χ a scalar depending on the Hubble parameter only, not on its derivatives, and which is here shown to arise from
Jaume de Haro +2 more
doaj +1 more source
Reply to the comment on "Quantum priniple of relativity" [PDF]
, 2022 We refute criticisms by Del Santo and Horvat towards our paper "Quantum principle of relativity": most of their counterarguments can be dismissed, and the rest provides further evidence to our claims.
arxiv +1 more source
On Quantum Cosmology in Teleparallel Gravity [PDF]
Journal of Physics: Conf. Series 965 (2018) 012014, 2018 A quantum cosmology in teleparallel gravity is presented in this article. Teleparallel gravity is used to perform such an analysis once in General Relativity (GR) the concept of gravitational energy is misleading preventing the establishment of a concise quantum cosmology. The Wheeler-DeWitt like equation is obtained using the Weyl quantization and the
arxiv +1 more source
Dynamics of the cosmological and Newton's constant [PDF]
, 2015 A modification of general relativity is presented in which Newton's constant and the cosmological constant become a conjugate pair of dynamical variables.
arxiv +1 more source
A short pre-history of Quantum Gravity [PDF]
, 2022 I describe the early, from the nineteen sixties, history of attempts at quantizing General Relativity.
arxiv +1 more source
Aspects of Quantum Theory in General Relativity and Cosmology
, 2020 After a brief introduction to Cosmology some quantum aspects of General Relativity and cosmology are presented. The radial motion of a massive particles in the ergosphere of the Kerr Black Hole is considered. Screening of Hawking radiation and shielding of the Penrose process is examined in the context of the region of negative energy inside the ...
openaire +2 more sources
Probing time orientability of spacetime
European Physical Journal C: Particles and Fields, 2023 In general relativity, cosmology and quantum field theory, spacetime is assumed to be an orientable manifold endowed with a Lorentz metric that makes it spatially and temporally orientable.
N. A. Lemos, D. Müller, M. J. Rebouças
doaj +1 more source
Te Vacancy‐Driven Anomalous Transport in ZrTe5 and HfTe5
Advanced Physics Research, EarlyView.Less is more! Recent discoveries in topological quantum materials have rekindled excitement for direct observation of quantum anomalies in a condensed matter physics laboratory, which is historically intractable in particle and cosmological physics. Using atomistic modeling this study sheds light on the source of the anomalous transport properties that
Elizabeth A. Peterson +2 more
wiley +1 more source
Bekenstein’s Entropy Bound-Particle Horizon Approach to Avoid the Cosmological Singularity
Entropy, 2020 The cosmological singularity of infinite density, temperature, and spacetime curvature is the classical limit of Friedmann’s general relativity solutions extrapolated to the origin of the standard model of cosmology.
James R. Powell +2 more
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Einstein, Planck and Vera Rubin: Relevant Encounters Between the Cosmological and the Quantum Worlds
Frontiers in Physics, 2021 In Cosmology and in Fundamental Physics there is a crucial question like: where the elusive substance that we call Dark Matter is hidden in the Universe and what is it made of?
Paolo Salucci +54 more
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