Bra-Ket notation

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  1. JBKProductions's Avatar
    1 18-06-2012  18:36
    • Overlord in Training
    • Posts: 2,105
    Bra-Ket notation
    If I have \displaystyle \sum_{m} P_m |m \rangle \langle m| . Why does this result in a diagonal matrix?
  2. Zhen Lin's Avatar
    2 18-06-2012  18:50
    • Vengeful, Imperial Overlord of The Student Room
    • Posts: 4,791
    Re: Bra-Ket notation
    Write out \left| m \right> \left< m \right| as a matrix. What is it?
  3. JBKProductions's Avatar
    3 18-06-2012  20:28
    • Overlord in Training
    • Posts: 2,105
    Re: Bra-Ket notation
    (Original post by Zhen Lin)
    Write out \left| m \right> \left< m \right| as a matrix. What is it?
    EDIT: nevermind i got it. Thanks.
    Last edited by JBKProductions; 18-06-2012 at 20:41.
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