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Homework Help: RDM notation equation help

  1. Mar 24, 2010 #1
    1. The problem statement, all variables and given/known data

    [tex]
    \hat{\rho} = \left|\Phi_{AB}\right\rangle\left\langle\Phi{AB}\right|
    = \alpha ( |Z+>_A|Z+>_B+|X+>_A|X+>_B)* \alpha ( <Z+|_B <Z+|_A+<X+|_B<X+|_A)

    [/tex]

    Is |Z+>_A|Z+>_B similiar to |00> ? I'm confused wiht notation

    2. Relevant equations



    3. The attempt at a solution
     
  2. jcsd
  3. Mar 24, 2010 #2

    Fredrik

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    Re: Rdm

    I think you will have to explain what |00> is, and what you mean by "similar". Also, what does |X+> mean? An eigenstate of the x-component of spin?
     
  4. Mar 24, 2010 #3
    Re: Rdm

    Ignore the question on |00>.

    Yes.
     
  5. Mar 25, 2010 #4

    Fredrik

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    Re: Rdm

    That was the only question you asked. :smile:
     
  6. Mar 25, 2010 #5
    Re: Rdm

    referring to the other post: https://www.physicsforums.com/showthread.php?t=389293

    Once I have found the reduxed density matrix

    p_a with a basis of {
    | 1 |
    | 0 | }

    and p_b with a basis of{

    | -1/4(sqrt2) |
    | 1 | }


    how do I finish off the problem to find the decomposition?
     
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