Is Each Pair in a Tripartite Cubic System in a Bell State?

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salley
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Hi .. I have this problem needed to solve I hope can find someone help me..

1- Is the system of three cubic in pure state <ψABC| each pair cubic in bell state |φ+>?
2- Consider a system of two cubits in state
upload_2017-2-6_3-48-58.png

Is the measurement without selecting observable
upload_2017-2-6_3-50-1.png
which
upload_2017-2-6_3-51-15.png
changes the state of a cubit B?

and thanks
 
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salley said:
three cubic

Do you mean "qubit"?

salley said:
in pure state <ψABC|

I don't know what this means.

Do you have a reference for where you are getting this problem from?