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A New Inflationary Universe Scenario with Inhomogeneous Quantum Vacuum
Advances in High Energy Physics, 2018 We investigate the quantum vacuum and find that the fluctuations can lead to the inhomogeneous quantum vacuum. We find that the vacuum fluctuations can significantly influence the cosmological inhomogeneity, which is different from what was previously ...
Yilin Chen, Jin Wang
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Backreaction in cosmic screening approach
Physics Letters B, 2023 We investigate the backreaction of nonlinear perturbations on the global evolution of the Universe within the cosmic screening approach. To this end, we have considered the second-order scalar perturbations.
Maxim Eingorn +3 more
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The great emptiness at the beginning of the Universe
Physics Letters B, 2021 The great emptiness is a possible beginning of the Universe in the infinite past of physical time. For the epoch of great emptiness particles are extremely rare and effectively massless.
C. Wetterich
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Lemaître-Tolman-Bondi static universe in Rastall-like gravity
Nuclear Physics B, 2020 In this work, we try to obtain a stable Lemaître-Tolman-Bondi (LTB) static universe, which is spherically symmetric and radially inhomogeneous. However, this is not an easy task, and fails in general relativity (GR) and various modified gravity theories,
Zhong-Xi Yu, Shou-Long Li, Hao Wei
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Interaction of inhomogeneous axions with magnetic fields in the early universe
Physics Letters B, 2022 We study the system of interacting axions and magnetic fields in the early universe after the quantum chromodynamics phase transition, when axions acquire masses. Both axions and magnetic fields are supposed to be spatially inhomogeneous.
Maxim Dvornikov
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Universe, 2023 The main objective of this article is to examine the stability of Einstein static universe using inhomogeneous perturbations in the context of energy–momentum squared gravity.
Muhammad Sharif, Muhammad Zeeshan Gul
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The Open Journal of Astrophysics, 2020 The Universe is not completely homogeneous. Even if it is sufficiently so on large scales, it is very inhomogeneous at small scales, and this has an effect on light propagation, so that the distance as a function of redshift, which in many cases is ...
Phillip Helbig
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Lattice simulations of non-minimally coupled scalar fields in the Jordan frame
SciPost Physics, 2023 The presence of scalar fields with non-minimal gravitational interactions of the form $\xi |\phi|^2 R$ may have important implications for the physics of the early universe.
Daniel G. Figueroa, Adrien Florio, Toby Opferkuch, and Ben A. Stefanek
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Hunting for Gravitational Quantum Spikes
Universe, 2021 We present the result of our examination of quantum structures called quantum spikes. The classical spikes that are known in gravitational systems, occur in the evolution of the inhomogeneous spacetimes.
Andrzej Góźdź +3 more
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Inhomogeneous Viscous Fluids in a Friedmann-Robertson-Walker (FRW) Universe
Galaxies, 2013 We give a brief review of some aspects of inhomogeneous viscous fluids in a flat Friedmann-Robertson-Walker Universe. In general, it is pointed out that several fluid models may bring the future Universe evolution to become singular, with the appearance ...
Ratbay Myrzakulov +2 more
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