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 ?
The existence of dark energy, a repulsive gravitational field that is a manifestation of the cosmological constant, was theorized as the likely cause of the acceleration [2].
That force might be the basis for the cosmological constant, an antigravity term now in vogue (SN: 2/28/98, p.
Current claims that the multiverse approach predicts the right level for the cosmological constant would then be disproved.
The simplest explanation was that empty space - the vacuum - had an energy density that was a cosmological constant.
Einstein had to introduce a cosmological constant to make his Universe static; otherwise it would have collapsed due to the gravitational field.
This is in contrast to the traditional static vacuum energy or cosmological constant.
So far, though, nobody is writing off the cosmological constant.
For example, Albert Einstein's theory of general relativity introduced the notion of a cosmological constant to explain what he assumed was a static universe, which was the prevailing scientific view at the time.
Einstein's Field equation with cosmological constant [lambda] is given by
The 60 papers examine such topics as cold compressed baryonic matter with hidden local symmetry and holography, topological and curvature effects in a multi-fermion interaction model, continuum superpartners from supersymmetric unparticles, new regularization in extra dimensional model and renormalization group flow of the cosmological constant, and critical behaviors of sigma-mode and pion in holographic superconductors.
Equation (8) states that there is a connection between the cosmological constant A and energy density [[rho]'.
Abstract: The Hobby-Eberly Telescope Dark Energy Experiment (HETDEX) aims to make a direct detection of dark energy at z~3, in the case that it is a cosmological constant.