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Homework Help: Help: QM

  1. Apr 8, 2007 #1
    1. The problem statement, all variables and given/known data
    Lasers produce a beam of light in which a large number of photons occupy
    the same quantum mechanical state. Is it possible to build a similar device
    producing such a beam of electrons? Explain.

    Can anyone help? I don't know on which concept should I base this. I just need a starting point. Thanks

  2. jcsd
  3. Apr 8, 2007 #2
    Wikipediate bosons and fermions. Which are photons? Which are electrons?
  4. Apr 8, 2007 #3
    Thanks for the reply.

    Great! I just started reading that.

    Photons -> bosons -> they can occupy same state
    Electrons -> fermions -> they can't occupy the same statebecause they are truly indistinguishable according to the Exclusion Principle -> thus we can't design the device

    How does that sound?
  5. Apr 8, 2007 #4
    Good- but both fermions and bosons are truly indistinguishable. You should also Wikipediate 'Pauli exclusion principle'.
  6. Apr 8, 2007 #5
    Alright .. thanks a lot .. that really helped :)

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