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I The absolute value of the frequency in quantum mechanics

  1. Feb 5, 2017 #1
    I was reading Bransden's Quantum Mechanics 2nd edition, chapter 2 page 61. There,it says "It should be noted that since E =hv (v for nu), the absolute value of the frequency has no physical significance in Quantum mechanics..."
    Why is that? Isn't this a contradiction?
     
  2. jcsd
  3. Feb 5, 2017 #2

    PeterDonis

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    Staff: Mentor

    Because the absolute value of the energy has no physical significance in QM (more precisely, in non-relativistic QM or in QFT in flat spacetime, where gravity is absent). Only differences in energy have physical significance.
     
  4. Feb 5, 2017 #3
    I see. I got it now. Thank you PeterDonis.
     
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