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Results tagged with quantum-state
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user 27427
Questions about or related to quantum states. Consider using the density-matrix tag when relevant.
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1
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qiskit statevector ordering issue
I am currently studying Qiskit.
I don't understand the two pictures below while studying.
When I apply circuit.x(1), the X gate should be applied to the second qubit, resulting in the state |01>. Ho …
- 131
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vote
1
answer
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I would like to understand the meaning of applying permutation to a unitary matrix
$$U = \frac{1}{2}
\begin{pmatrix}
-1 & -1 & 1 & 1 \\\\
1 & -1 & 1 & -1 \\\\
1 & -1 & -1 & 1 \\\\
1 & -1 & 1 & 1
\end{pmatrix}$$
$$P = \frac{1}{2}
\begin{pmatrix}
1 & -1 & -1 & 1 \\\\
1 …
- 131