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B Below and above the Planck Scale

  1. Jun 27, 2016 #1


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    Below planck scale means inside the planck scale, and above planck scale means outside of planck scale?

    If the term is correct.. why doesn't quantum gravity theory like Loop Quantum Gravity affect low energy experiments above the planck scale (outside of planck scale)?

    Quantum field theory is said to be the result of effective field theory above the planck scale. But if we know the complete theory. Shouldn't we be able to affect even above (outside) the planck scale for example by directly manipulating spacetime and matter to engineer stuff only dreamt of at present due to our locked into the limitation of the effective field theory?
  2. jcsd
  3. Jun 27, 2016 #2


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    Staff: Mentor

    It probably does, but the effects there are small enough that we don't see them. The Planck scale is roughly the level below which quantum gravitational effects cannot be ignored.
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