How Does RDM Notation Relate to Quantum State Representation?

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Homework Statement



<br /> \hat{\rho} = \left|\Phi_{AB}\right\rangle\left\langle\Phi{AB}\right| <br /> = \alpha ( |Z+&gt;_A|Z+&gt;_B+|X+&gt;_A|X+&gt;_B)* \alpha ( &lt;Z+|_B &lt;Z+|_A+&lt;X+|_B&lt;X+|_A)<br /> <br />

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

Homework Equations





The Attempt at a Solution

 
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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?
 


Ignore the question on |00>.

Yes.
 


That was the only question you asked. :smile:
 


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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