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.
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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 ?
Indeed, in this case the condensate has a state equation which coincides with one of the cosmological constants and can contribute to the dark energy of the universe [41, 42].
and the state equation is the ones of the cosmological constant, [w.sup.B.sub.mix] = -1.
But so far such tests show no deviation from standard gravity and a cosmological constant. This fact drives interest in a multiverse solution, in which different causally disconnected domains may be able to possess different effective cosmological constants.
Negative cosmological constants cause deceleration, while positive values have a repulsive effect that tends to accelerate expansion.
Einstein imagined a universe that was eternal and static, with the gravitational attraction of ordinary matter exactly balanced by the repulsive effects of a "cosmological constant" (S&T: April 1991, page 362).
The parameters in the bulk, such as the gravitational and cosmological constants, can differ on either side of the brane.
For instance, different black hole masses were obtained on the two sides on the brane [17], as well as different cosmological constants on the two sides [19-24].