cosmological constant

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cosmological constant

n.
A constant introduced into the general theory of relativity, proportional to the energy density of the vacuum, and related to the rate of expansion or contraction of the universe. The vacuum energy represented by the cosmological constant is a form of dark energy.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.cosmological constant - an arbitrary constant in the equations of general relativity theory
constant - a number representing a quantity assumed to have a fixed value in a specified mathematical context; "the velocity of light is a constant"
Translations
kosmologinen vakio
References in periodicals archive ?
In a paper dealing with the cosmological constant problem [6], the time evolution of the universe world line was compared with the growing of a polymer chain by making use of a Flory-like free energy.
Resolving this problem, often called the cosmological constant problem, has so far eluded theorists.
Now, two physicists - Lawrence Krauss of Arizona State University and James Dent of University of Louisiana-Lafayette - suggest that the recently discovered Higgs boson could provide a possible "portal" to physics that could help explain some of the attributes of the enigmatic dark energy and help resolve the cosmological constant problem.
There are several other fine-tuning situations in cosmology, most notably the horizon problem (22) and the cosmological constant problem. (23) The horizon problem refers to the fact that the temperature of the cosmic microwave background is uniform everywhere to 1 part in 30,000, but there has been insufficient time for the different regions of the universe to come into thermal contact to make this possible.
Introduction to general relativity and the cosmological constant problem.
Weinberg, "The cosmological constant problem," Reviews of Modern Physics, vol.
The cosmological constant problem. Reviews of Modern Physics, 1989, v.
In models of the dark sector we hope to explain the "coincidence problem": why the densities of the dark matter and the dark energy are of the same order today as well as "the cosmological constant problem" [5]; why the cosmological constant is so small.
As shown in [5], it is not the SM mathematics, but the "standard" view of the mathematics that results in the Cosmological Constant Problem while hiding Nature's mass symmetry, a symmetry in keeping with the cosmological constant and a symmetry that results in a single mass formula for the fundamental particles ([W.sup.[+ or -]], [p.sup.[+ or -]], [e.sup.[??]]) and electron generations.