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Creation of matter and energy out of nothing.

  1. Sep 27, 2014 #1
    I got a question in my mind as to how the tiny dot of matter during the big bang contained so much energy that could create the universe. Remember this tiny dot contained so much energy that it could transform this energy into matter in the form of the universe (Remember E=MC2).

    The Quantum field theory says we can create something out of nothing. So the energy or matter created after the big bang would be more than the initial energy or matter. This is due to quantum fluctuations. In quantum physics, a quantum vacuum fluctuation (or quantum fluctuation or vacuum fluctuation) is the temporary change in the amount of energy in a point in space. False vacuum was formed by means of a random quantum fluctuation. Let me explain what false vacuum is. Empty space has various phases, just as water has solid and liquid phases. So False Vacuum is a phase of vacuum. When water freezes to form ice, it releases energy. When false vacuum "freezes" (Or decays) to form true vacuum (a different phase of the vacuum) it also releases energy. There's nothing really true or false about "true vacuum" and "false vacuum;" those are just the historical names that ended up being given to certain particular states of the field. A false vacuum is not the state of least energy and it can decay into a state of least energy or true vacuum state. During inflation, the expansion rate of the universe was controlled by the gravitational repulsion of the false vacuum.

    Eventually the false vacuum decays to true vacuum or ground state which is the lowest energy state, and the energy that had been locked in it is released. This energy produces a hot, uniform, soup of particles (Quark-Gluon Plasma). The false vacuum would eventually decay into a low-energy true vacuum, the decay of the false vacuum at the beginning of the universe could cause a rapid expansion at ever-increasing rates, which is called cosmic inflation. This energy released after decay of false vacuum is called primal energy which came from a false vacuum. Then the universe was created from this primal energy. Remember E=MC2.

    So I am saying that matter and energy were created out of nothing due to Quantum Fluctuations. So, am I correct?
     
  2. jcsd
  3. Sep 27, 2014 #2
    Hmmm...I understand your line of reasoning but have you considered the inherent failure for the laws of deductive logic to allow for something which is nothing to become more than it what it was once. So the real mystery to be solved is not whether you are correct about your conclusion that something came out of nothing because of "quantum fluctuations"...but rather...what is wrong with the structural integrity of "quantum fluctuation" theory which allows for it to be considered a potential truism that "nothingness" can become "somethingness"?
     
  4. Sep 27, 2014 #3

    bhobba

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    Actually the modern view is the universe is a free lunch:
    http://en.wikipedia.org/wiki/Zero-energy_universe

    Strangely it turns out gravity has negative energy and it balances the positive energy of matter.

    Thanks
    Bill
     
  5. Sep 27, 2014 #4
    We don't know whether false vacuum was created, or existed primordially, or even whether can exist. I think it may be a good idea to tone down the level authoritativeness in your statements.

    Your explanation is incomplete. A vacuum state is a state where any small change in quantum fields would increase energy. IOW: a vacuum is a state with local minimum of energy.

    If the laws of nature (equations governing interaction of all existing quantum fields) are such that there are more than one configuration of fields which exhibits local energy minimum, then nature has more than one possible vacuum.

    Correct.

    This is currently not known. What you state is just one of many theories.
     
  6. Sep 27, 2014 #5
    IIRC there is no known consistent QFT which describes gravity. So, all known working QFTs operate in Minkovski space of Special Relativity. They do not describe "gravitational repulsion" or any other aspect of gravity. As far as QFTs are concerned, they can only describe a fixed, non-changing volume of space. It may be infinite, but it can't be expanding - QFTs just don't have means to handle that.

    So, no, QFT does not say that we can create something out of nothing. In today's known QFTs, energy is conserved.

    I think it's quite likely that when we will find a consistent description of quantum gravity, it won't be conserving energy. GR already has difficulties with that.
     
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