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Spin Quantum # in Triplet state

  1. Jan 9, 2013 #1
    Hello,

    For two spin 1/2 identical particles, the triplet state is:

    |UP,UP>
    1/√2 (|UP,DOWN> + |DOWN,UP>)
    |DOWN,DOWN>

    Q1: in the up,up or down,down, are the two electrons considered to have the same spin quantum number?

    Q2: If so, then only the middle one (see above) is where they have different spin quantum numbers, right?

    Q3: In the Singlet state, they have different spin quantum numbers, right?
     
  2. jcsd
  3. Jan 9, 2013 #2

    Meir Achuz

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    The are two spin Q numbers. They have the same s^2, but different s_z.
     
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