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Particle horizon
About: Particle horizon is a research topic. Over the lifetime, 2096 publications have been published within this topic receiving 69137 citations.
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4 citations
TL;DR: In this paper, the authors consider cosmological models in which a homogeneous isotropic universe is embedded as a 3+1 dimensional surface into a 4+ 1 dimensional manifold.
4 citations
TL;DR: In this article, it was shown that the universe is a lot smaller than we thought, and that it is possible to look at the back of our own heads, so to speak.
Abstract: It would be hard to argue with Douglas Adams's statement, in The Hitch-Hiker's Guide to the Galaxy, that “Space is big”. But it may be a lot smaller than we thought. Evidence had come from the cosmic microwave background that the Universe is infinite, or at least not small compared with the distance we can see; but two astrophysicists have realized that this doesn't hold if the Universe has a low density. Such a so-called ‘open’ Universe can nevertheless be wrapped round on itself, allowing us to look at the back of our own heads, so to speak. We could soon find out for sure, as the scheduled satellites MAP and PLANCK search the microwave sky for identical rings.
4 citations
TL;DR: In this article, a non-Archimedean algebraic approach to a flat and finite universe of total mass M 0 and radius R 0 is described. But the authors focus on the radial distance metric, which is compressed toward the horizon, which causes the red shift phenomenon.
Abstract: Application of recently developed non-Archimedean algebra to a flat and finite universe of total mass M0 and radius R0 is described. In this universe, mass m of a body and distance R between two points are bounded from above, i.e., 0≤m≤M0, 0≤R≤R0. The universe is characterized by an event horizon at R0 (there is nothing beyond it, not even space). The radial distance metric is compressed toward horizon, which is shown to cause the phenomenon of red shift. The corresponding modified Minkowski's metric and Lorentz transforms are obtained. Applications to Newtonian gravity shows a weakening at large scales (R→R0) and a regular behavior as R→0.
4 citations
01 Jan 2000
TL;DR: In this article, the cosmological scale might be an arena to test those long distance quantum correlations, and the experimental results support the view that distance has no effect on quantum correlations.
Abstract: The recent experiments on long-distance Bell-type tests clearly indicate that quantum correlations between photons can persist for very long distances at least over 10 km. These experimental results support the view that distance has no effect on quantum correlations. We propose that the cosmological scale might be an arena to test those long distance quantum correlations.
4 citations