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Vacuum Energy: Myths and Reality
Posted on Wednesday, September 06, 2006 @ 22:37:59 UTC by vlad

Science Authors: G.E. Volovik, Helsinki University of Technology, Low Temperature Laboratory, P.O. Box 2200, FIN–02015 HUT, Finland,
Landau Institute for Theoretical Physics, 119334 Moscow, Russia
volovik@boojum.hut.fi

Comments: 24 pages, 2 figures, submitted to the special issue of Int. J. Mod. Phys. devoted to dark energy and dark matter, IJMP style
Subj-class: General Relativity and Quantum Cosmology; Statistical Mechanics




We discuss the main myths related to the vacuum energy and cosmological constant, such as: ``unbearable lightness of space-time''; the dominating contribution of zero point energy of quantum fields to the vacuum energy; non-zero vacuum energy of the false vacuum; dependence of the vacuum energy on the overall shift of energy; the absolute value of energy only has significance for gravity; the vacuum energy depends on the vacuum content; cosmological constant changes after the phase transition; zero-point energy of the vacuum between the plates in Casimir effect must gravitate, that is why the zero-point energy in the vacuum outside the plates must also gravitate; etc. All these and some other conjectures appear to be wrong when one considers the thermodynamics of the ground state of the quantum many-body system, which mimics macroscopic thermodynamics of quantum vacuum. In particular, in spite of the ultraviolet divergence of the zero-point energy, the natural value of the vacuum energy is comparable with the observed dark energy. That is why the vacuum energy is the plausible candidate for the dark energy.

Full text here: http://arxiv.org/abs/gr-qc/0604062

 
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"Vacuum Energy: Myths and Reality" | Login/Create an Account | 3 comments | Search Discussion
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DARK ENERGY AND DARK MATTER - THE RESULTS OF FLAWED PHYSICS? (Score: 1)
by vlad on Tuesday, September 12, 2006 @ 23:19:26 UTC
(User Info | Send a Message) http://www.zpenergy.com
DARK ENERGY AND DARK MATTER - THE RESULTS OF FLAWED PHYSICS?, September 11

There are few scientific concepts as intriguing and mysterious as dark energy and dark matter, said to make up as much as 95 percent of all the energy and matter in the universe. And even though scientists don't know what either is and have little evidence to prove they exist, dark energy and dark matter are two of the biggest research problems in physics.
Full story at http://www.physorg.com/news77190620.html




Re: Vacuum Energy: Myths and Reality (Score: 1)
by malc on Thursday, September 07, 2006 @ 00:18:18 UTC
(User Info | Send a Message) http://web.ukonline.co.uk/mripley
Vacuum energy is the plausible candidate for the dark energy....DUH!

Hence why any/all "free energy" devices do NOT break the first two laws of thermodynamics. It's all so easy and obvious.  The trick is in the conversion from dark energy to visible energy and extracting work from the conversion.



 

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