Topic
Particle horizon
About: Particle horizon is a research topic. Over the lifetime, 2096 publications have been published within this topic receiving 69137 citations.
Papers published on a yearly basis
Papers
More filters
19 Jul 2022
TL;DR: In this paper , the authors proposed a relativistic model of the universe in which the geometry describes a 4D version of the 2-sheeted hyperboloid that is isotropic, homogeneous in space at a given time and inhomogeneous in time.
Abstract: This paper proposes a relativistic model of the Universe in which the geometry describes a 4D version of the 2-sheeted hyperboloid that is isotropic, homogeneous in space at a given time and inhomogeneous in time. The radius of this metric is temporal as opposed to spatial. It predicts both a Universe and Anti-Universe moving in opposite directions of time undergoing an expansion phase, followed by a collapsing phase. Using only the current age of the Universe and transition redshift, it predicts the accelerated expansion and it is shown that its Hubble diagram fits currently available supernova and quasar data as well as predicting a Hubble constant $H_0\approx71.6km/s/Mpc$. The angular term of the metric describes time dilation caused by the relativistic kinematic precession effect known as Thomas Precession which can be interpreted as spin about the time dimension. The model also makes two novel predictions: that the early Universe should have structures older than expected due to an increased amount of proper time relative to coordinate time in that era and that the background Universe should appear brighter than current models predict.
TL;DR: In this article, the authors review the moment transport equations methodology and the subsequent calculation of the non-gaussianity parameter, which is a useful tool to discriminate among these cosmological models when comparing the theoretical predictions with the satellite survey results like those from WMAP and Planck.
Abstract: There are many inflationary models that allow the formation of the large-scale structure of the observable universe. The non-gaussianity parameter $f_{NL}$ is a useful tool to discriminate among these cosmological models when comparing the theoretical predictions with the satellite survey results like those from WMAP and Planck. The goal of this proceeding contribution is to review the moment transport equations methodology and the subsequent calculation of the $f_{NL}$ parameter.
TL;DR: In this paper, the classical dynamics of a test particle in a homogeneous closed universe is investigated and the canonical method is used to obtain dynamical quantities unambiguously, and the picture of the motion is described in the chronometric three-space.
Abstract: The classical dynamics of a test particle in a homogeneous closed universe is investigated. The canonical method is used to obtain dynamical quantities unambiguously. The picture of the motion is described in the « chronometric » three-space. The Newtonian inertial mass is decreasing with the expanding universe.
DOI•
24 Aug 2014TL;DR: In this article, the evolution of complexity in an ever expanding universe is examined using the usual definitions of information and entropy in quantum gravity and statistical mechanics and existing views about the relation between information and complexity.
Abstract: Using the usual definitions of information and entropy in quantum gravity and statistical mechanics and the existing views about the relation between information and complexity, we examine the evolution of complexity in an ever expanding universe.
Posted Content•
TL;DR: In this article, it is hypothesised that the universe is not only expanding in space, but also in time (i.e. time slows down as the universe ages) and a new universal unit of time, acting as a scaling factor for the universe, is proposed.
Abstract: It is hypothesised that the Universe is not only expanding in space, but also in time (i.e. time slows down as the Universe ages). A new universal unit of time, acting as a scaling factor for the Universe, is proposed. An equation to calculate the age of the Universe and an equation to calculate the exact value of the gravitational constant G from the other fundamental constants are introduced. This hypothesis opens the way to the development of a new cosmological model and the unification of quantum mechanics with general relativity.