vacuum energy


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vacuum energy

n.
Background energy in a vacuum associated with vacuum fluctuations.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
References in periodicals archive ?
Virtual particles burst into and out of existence, together generating an ubiquitous vacuum energy. The existence of this energy has been confirmed in various experiments, such as in the Casimir effect, in which two uncharged plates in a vacuum still feel a force between them.
Think of it as a kind of vacuum energy permeating the fabric of spacetime that defies measure."
In the explanation of the Universe, we encounter the old problem of the cosmological constant, which is related to understanding why the measured value of the vacuum energy is so small in comparison with the value calculated using quantum field theory methods [1].
In Einstein's equations of general relativity, empty space plays an important role in the universe model, being an important operator in the quantity known as the "cosmological constant," which can be thought of as the measure of vacuum energy.
To ease the transition to a central vacuum system we're offering free vacuum energy audits to new customers and a 30-day no obligation trial of the technology on certain models."
The quasi-particles vacuum energy and the dependence of the chemical potential on the electron density are derived.
Equations (16) and (17) from the perturbed spacetime can be understood as follows: the free-space energy from [[phi].sub.0] in the first term of (16) drives the vacuum energy associated with the second term; this [[chi].sub.0] energy of the second term in (17) then feeds back into the [[phi].sub.0] term in (16), leading to a circular simultaneity between the two equations that represent the coupled nonrelativistic behavior of the core-PV system.
Vacuum energy overcomes the resistance created by air and material as they move through the pipes.
These scientists propose that dark energy is a type of dynamical quantum vacuum energy that acts in the accelerated expansion of our universe.
Most physicists suspect that dark energy is a form of vacuum energy known as the "cosmological constant" because its strength never varies.