Questions tagged [quantum-circuit]

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6
votes
2answers
194 views

How to compute the measurement probability in swap test?

The figure of a circuit and the state are as follows. The final state before the measurement is $|O_{out}\rangle=\frac{1}{2}|0\rangle(|\phi\rangle|\psi\rangle+|\psi\rangle|\phi\rangle)+\frac{1}{2}|1\...
0
votes
2answers
158 views

Should C-NOT gate affect “input” qubit or not?

In MS presentation, they describe the process CNOT gate working with state machine diagram. At first they drew CNOT gate in ...
10
votes
3answers
302 views

Superposition of quantum circuits

Given a quantum circuit $C_1$ that generates a state $\vert\psi\rangle$ and another circuit $C_2$ that generates $\vert\phi\rangle$, is there a way to construct a circuit that outputs $$\frac{1}{\sqrt{...
0
votes
1answer
37 views

Quantum circuit, Fourier Transform/Decomposition?

Broadly speaking, can we say that quantum circuits are like Fourier Transform/Decomposition? We use qbit like waves, tune it with quantum gates, to find answer. https://ars.els-cdn.com/content/image/3-...