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Virtual particles

  1. Sep 20, 2004 #1
    Why can't a negative energy virtual particle escape from a black hole?
    Could two sets of virtual particles arise from the same point in space simultaneously? And would they have to annihilate simultaneously?
    And how does a rapidly oscillating gravitational field affect virtual particle
    creation and annihilation?
    What is the greatest energy a virtual particle can possibly have?
  2. jcsd
  3. Sep 20, 2004 #2
    Look up Hawking radiation.
    Two sets? If you mean two pairs, then I suppose it's possible, and their existence would be largely independent.
    Currently there is no upper bound on their energies. It's possible that in a quantum theory of gravity there would be a cutoff at the Planck scale, but that's all hypothetical.

    My turn: are these unrelated questions going somewhere?
  4. Sep 20, 2004 #3
    Hmm... I seem to remember from a course on the standard model of particle physics that this is indeed possible - however its much more unlikley than the case of just one particle pair being formed. I think (and can only hope that someone wise will read this and correct it) that when you try to calculate the probalility of an event ocuring you have to take into account all of these less and less likely routes by which an event could occur?
  5. Sep 20, 2004 #4
    Zefram C:
    My turn: are these unrelated questions going somewhere?

    Rothie M:
    I would like to know, if quarks and an electron,in the early universe, separated by the planck distance -10^-35 m - still absorb and emit virtual photons ,as they do at larger distances, in the current universe.
    Loop quantum gravity theorists say that Einstein's laws were still valid at the Planck scale,so were other laws too?
    Last edited: Sep 20, 2004
  6. Sep 20, 2004 #5
    When particles are separated by a distance comparable to the Planck distance, they can hear each other, so they keep talking about how stupid humans are. The laughing that results from those conversations is so strong, it tears them apart by a factor of several order of magnitudes. That is the reason particles are so sad. They cannot help talking about our stupidity, and it makes them lonely.

    What I'm wrong !? How do you know ? Particles refuse to talk to us anyway.
  7. Sep 20, 2004 #6
    Them soundwaves from those particles talking, were they doppler shifted by the Big Bang?
  8. Sep 20, 2004 #7
    kind of relating to the subject, how do you calculate how much energy a virtual particle can borrow?, if that makes any sence.....
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