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    Does QM violate the causality principle?

    Hello, As written, I am wondering if the causality principle gets violated in QM. Do virtual particles violate the causality principles? Do instantaneous events violate the causality principle? Thank you in advance.
  2. H

    Is the universe a causal system?

    A simple question. I might ask this as well: Is the universe causal? The reason I'm asking this is that today I've ran into two guys having an argument about this, so I want to know. Thank you.
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    Do quantum fluctuations come from nothing ?

    Do quantum fluctuations come from "nothing"? Hello, I have two questions regarding quantum fluctuations. Do the particle (and its' anti-particle) appear from nothing? I know it happens in a Quantum vacuum. But do the particles themselves appear from nothing? Where do they get their energy...