Results 41 to 50 of about 507 (119)

A short introduction to cosmology and its current status

SciPost Physics Lecture Notes
The current cosmological model, known as the $\Lambda$-Cold Dark Matter model (or $\Lambda$CDM for short) is one of the most astonishing accomplishments of contemporary theoretical physics.
Pedro G. Ferreira, Alexander Roskill
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Cosmic Inflation, Quantum Information and the Pioneering Role of John S Bell in Cosmology

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
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Brane-World Gravity

Living Reviews in Relativity, 2010
The observable universe could be a 1+3-surface (the “brane”) embedded in a 1+3+d-dimensional spacetime (the “bulk”), with Standard Model particles and fields trapped on the brane while gravity is free to access the bulk.
Roy Maartens, Kazuya Koyama
doaj  

On the Geometric Meaning of General Relativity and the Foundations of Newtonian Cosmology

AppliedMath
The geometric foundations of General Relativity are revisited here, with particular attention to its gauge invariance, as a key to understanding the true nature of spacetime.
Jaume de Haro, Emilio Elizalde
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Power-series dynamics equation of fields based on geometric algebra and high-order covariant-derivative schemes

AIP Advances
Based on previous work, we explore in the context of quantum field theory and cosmology a geometric algebra (GA)-based approach to field dynamics through a multi-derivative power-series equation.
R. W. Haase
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A review of basic results on the Bose–Einstein condensate dark matter model

Frontiers in Astronomy and Space Sciences
We review basic results on the Bose–Einstein condensate dark matter (BECDM) model. Self-gravitating BECs experience a collisionless process of gravitational cooling and violent relaxation, leading to BECDM halos with a “core-envelope” structure.
Pierre-Henri Chavanis, Pierre-Henri Chavanis   +1 more
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Quantum Field Theory of Black Hole Perturbations with Backreaction: I General Framework

Universe
In a seminal work, Hawking showed that natural states for free quantum matter fields on classical spacetimes that solve the spherically symmetric vacuum Einstein equations are KMS states of non-vanishing temperature.
Thomas Thiemann
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Quantum Effects on Cosmic Scales as an Alternative to Dark Matter and Dark Energy

Universe
The spin-torsion theory is a gauge theory approach to gravity that expands upon Einstein’s general relativity (GR) by incorporating the spin of microparticles. In this study, we further develop the spin-torsion theory to examine spherically symmetric and
Da-Ming Chen, Lin Wang
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Batalin–Fradkin–Vilkovisky quantization of Einstein gravity with off-diagonal solutions encoding Hořava type generating functions

European Physical Journal C: Particles and Fields
We develop and apply the Batalin–Fradkin–Vilkovisky (BFV) formalism for the covariant quantization of generic off-diagonal solutions of the Einstein equations in general relativity (GR).
Elşen Veli Veliev, Sergiu I. Vacaru
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Det kosmologiska valet. Om Gud, big bang och universums existentiella mysterium

Svensk Teologisk Kvartalskrift, 2013
One of the premises of the so-called Kalām Cosmological Argument is that the universe began to exist. Modem Big Bang cosmology may seem to provide remarkable support for this hypothesis, since it estimates the universe to be 13.7 billion years old.
Martin Lembke
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