A Urgent problem -- Bell State

1. Feb 5, 2017

salley

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

Is the measurement without selecting observable which changes the state of a cubit B?

and thanks

2. Feb 5, 2017

Staff: Mentor

Do you mean "qubit"?

I don't know what this means.

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

3. Feb 10, 2017

stevendaryl

Staff Emeritus
What I'm curious about is what makes it urgent.