# Tag Info

Accepted

### Understanding Controlled Operation

The best way to see this is through an example. Consider the circuit below: qubit that is in an eigenstate of the unitary Note that $|-\rangle$ is an eigenstate ...
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• 13.6k

### How to determine with local measurements which Bell state we have?

If two-qubit unitary transformations are allowed then the problem is straightforward. Consider the unitary $$U = (|0\rangle \langle 0 | \otimes I + |1\rangle \langle 1|\otimes I) (H \otimes I),$$ i....
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Accepted

• 316
1 vote
Accepted

### Implementing deutsch_problem(seed=None) and deutsch() from qiskit text

This is how I do it, I tried to append gate directly with to_gate, remember to transpile or decompose the label gate before run simulator. if you want to get unitary of the gate, you can use Operator ...
• 551

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