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A Universe from Nothing
Posted on Thursday, September 17, 2015 @ 00:26:49 EDT by vlad

Science by Alexei V. Filippenko and Jay M. Pasachoff

Insights from modern physics suggest that our wondrous universe may be the ultimate free lunch.

In the inflationary theory, matter, antimatter, and photons were produced by the energy of the false vacuum, which was released following the phase transition. All of these particles consist of positive energy. This energy, however, is exactly balanced by the negative gravitational energy of everything pulling on everything else. In other words, the total energy of the universe is zero! It is remarkable that the universe consists of essentially nothing, but (fortunately for us) in positive and negative parts.


You can easily see that gravity is associated with negative energy: If you drop a ball from rest (defined to be a state of zero energy), it gains energy of motion (kinetic energy) as it falls. But this gain is exactly balanced by a larger negative gravitational energy as it comes closer to Earth’s center, so the sum of the two energies remains zero.

The idea of a zero-energy universe, together with inflation, suggests that all one needs is just a tiny bit of energy to get the whole thing started (that is, a tiny volume of energy in which inflation can begin). The universe then experiences inflationary expansion, but without creating net energy.

What produced the energy before inflation? This is perhaps the ultimate question. As crazy as it might seem, the energy may have come out of nothing! The meaning of “nothing” is somewhat ambiguous here. It might be the vacuum in some pre-existing space and time, or it could be nothing at all – that is, all concepts of space and time were created with the universe itself.

Quantum theory, and specifically Heisenberg’s uncertainty principle, provide a natural explanation for how that energy may have come out of nothing. Throughout the universe, particles and antiparticles spontaneously form and quickly annihilate each other without violating the law of energy conservation. These spontaneous births and deaths of so-called “virtual particle” pairs are known as “quantum fluctuations.” Indeed, laboratory experiments have proven that quantum fluctuations occur everywhere, all the time. Virtual particle pairs (such as electrons and positrons) directly affect the energy levels of atoms, and the predicted energy levels disagree with the experimentally measured levels unless quantum fluctuations are taken into account...

Full article: https://www.astrosociety.org/publications/a-universe-from-nothing/


 
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"A Universe from Nothing" | Login/Create an Account | 1 comment | Search Discussion
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Is the Free Vacuum Energy Infinite? (Score: 1)
by vlad on Sunday, November 15, 2015 @ 13:10:24 EST
(User Info | Send a Message) http://www.zpenergy.com
Advances in High Energy Physics
Volume 2015 (2015), Article ID 278502, 3 pages
http://dx.doi.org/10.1155/2015/278502

Research Article
Is the Free Vacuum Energy Infinite?
H. Razmi and S. M. Shirazi

Abstract

Considering the fundamental cutoff applied by the uncertainty relations’ limit on virtual particles’ frequency in the quantum vacuum, it is shown that the vacuum energy density is proportional to the inverse of the fourth power of the dimensional distance of the space under consideration and thus the corresponding vacuum energy automatically regularized to zero value for an infinitely large free space. This can be used in regularizing a number of unwanted infinities that happen in the Casimir effect, the cosmological constant problem, and so on without using already known mathematical (not so reasonable) techniques and tricks...

Source: http://www.hindawi.com/journals/ahep/2015/278502/ [www.hindawi.com]



 

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