Let us consider, we can easily prepare 2 distinct single qubit quantum states psi1 and psi2 in quantum registers (q1 and q2) in a quantum circuit. How to find out the entanglement status of these two quantum states using quantum circuit?
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Are we talking about pure states or mixed states? The answer is much more complicated in the latter case. – Franklin Pezzuti Dyer Mar 30 '23 at 22:47
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I asked a similar question before here. The answer I accepted was mainly about mixed states, but I don't think much is known about the pure state case. – Loic Stoic Mar 31 '23 at 02:14
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Not strictly a circuit but https://quantumcomputing.stackexchange.com/questions/2263/how-do-i-show-that-a-two-qubit-state-is-an-entangled-state could be helpful – 3yakuya Mar 31 '23 at 15:33