Quantum Computing Asked by Rehaan Ahmad on July 22, 2020
I have an extension to the following question: How to get the relative phase of a qubit?
How do I get the relative phase of a pair of entangled qubits such as $$frac{1}{sqrt{2}}(|00rangle+e^{itheta}|11rangle)$$
in which I want to find theta. I tried to use a similar methodology as the answer in the linked question above, but with no success.
$$frac{1}{sqrt{2}}(|0rangle+e^{itheta}|1rangle) otimes |0rangle$$
Correct answer by Mariia Mykhailova on July 22, 2020
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