Aleksey Zhuravlev
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How can we construct a square root of NOT gate in Qiskit and IBMQ circuit composer using universal gates?
2 votes

Since the NOT gate from the question is the X gate in IBMQ/Qiskit, hereinafter we will call it only the X gate and, accordingly, the square root of the X gate or SqrtX. How to construct SqrtX using ...

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How to implement the controlled square root of NOT gate on the IBM Q composer?
1 votes

If take e.g. this decomposition of the square root of NOT then it's so simple in the IBM Q composer: And although it is unlikely that this circuit form actually consists of 3 elementary gates (I ...

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Is it possible to detect the phase $\pi$ or 0 for the single qubit circuit X H P?
Accepted answer
1 votes

I think unlike the relative phase in the answer you reference, it is a global phase in your case: Your XHP-circuit where P=ID, prepares the state: [0.707+0j,-0.707+0j], where P=X, prepares the state: [...

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Can you encode two values in a single qubit state, say its phase and orientation?
1 votes

What is "a single qubit state" in your question? If it is really a single qubit in a unique unknown state and there are no other qubits in the same state (for example, prepared in the same ...

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Transferring GHZ state onto some qubits
1 votes

About checking. I do not quite understand why you can't check how the GHZ-state was teleported in the most ordinary ways: in addition to measuring the state immediately after teleportation, as well as ...

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Quantum Katas - Tutorials - SingleQubitGates - Exercise 2 - GlobalPhaseI
1 votes

I apologize, but I can not comment on @Martin Vesely answer above. I am glad that my amendments have already been adopted, I’ll leave only a short note, in case someone is interested in this: In ...

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