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Probability of particle to exceed C?

  1. Oct 2, 2015 #1
    Is there a small probability for a particle or a photon to appear slightly exceed the speed of light?
  2. jcsd
  3. Oct 2, 2015 #2
    Most physicists probably think this does not happen in reality. In [relativistic] QFT it is not possible. In non-relativistic QM there is such a non-zero probability of getting a particle to move faster than light but it is considered a failing of the theory.
    Last edited: Oct 2, 2015
  4. Oct 2, 2015 #3


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    Staff: Mentor

    Of course there is nothing surprising about a non-relativistic theory allowing faster-than-light travel - that's part of what being non-relativistic means.
  5. Oct 2, 2015 #4
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