Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Universe Creates Particles

  1. Mar 29, 2013 #1
    We know that the universe creates particles and antiparticles every time.I know that it's happens by uncertainty principle.I want to know, when the universe creates them, the universe gives a energy to create this particles.But when they coupled there must be radiate x-rays.My question is,
    Is it happens somewhere in the universe (can we see this x-rays ?) or when they coupled, Is the mass returns energy and the universe absorbs this energy ?
     
  2. jcsd
  3. Mar 29, 2013 #2

    mfb

    User Avatar
    2016 Award

    Staff: Mentor

    That is a problematic model, and it is not related to the uncertainty principle.
    It does not, the total energy is 0.
    They do not.
     
  4. Mar 29, 2013 #3
    Hawking Radiation's foundation is this imaginary particles
     
  5. Mar 29, 2013 #4

    mfb

    User Avatar
    2016 Award

    Staff: Mentor

    Virtual particle/antiparticle pairs are a model to visualize the result of the calculations.
     
  6. Mar 29, 2013 #5

    bapowell

    User Avatar
    Science Advisor

    Yes, as mfb says, there isn't a single whiff of virtual particles in Hawking's calculation, either in the math or the physics. The picture based on virtual particles is a popularization designed to assist in visualizing the physics, but it is not rigorously informed by the calculation.
     
  7. Mar 30, 2013 #6
    I think its not a problematic model, the virtual particle pairs theory must be true. But you are right, the total energy must be zero.And there will be never x-rays or something.
     
  8. Mar 30, 2013 #7

    bapowell

    User Avatar
    Science Advisor

    Why must it be true?
     
  9. Mar 30, 2013 #8

    mfb

    User Avatar
    2016 Award

    Staff: Mentor

    There is no "virtual particle pairs theory". There is quantum field theory, which has fields as fundamental elements. For weak interactions (like the electromagnetic interaction), it is possible to approximate the action of fields with perturbation theory, and virtual particles are a method to visualize those perturbations.
    Those particles are called "virtual" for a good reason. It does not make sense to say "see: there was a virtual particle pair right now!"
     
  10. Mar 30, 2013 #9
    The universe can't be real "empty" because that time the electromagnetic field or another fields value and the rate of change over time must be exactly zero. And we know, it cant be possible so Fields value and the rate of change over time like a particles location and momentum.And it is like a uncertainty principle.Field value must be hosted uncertanity.And it happens create virtual particle pairs in the universe.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook