23:1623:16, 24 October 2023diffhist+895
Parity measurement
The following sentence was changed since it is not always true: A parity measurement to determine the equality or inequality of two qubits can be accomplished using a series of CNOT gates, which is then stored in a "check bit", called the ancillary qubit. If we want to learn the parity in the X basis, then we can apply Controlled-X gates. However, application of Controlled gate depends on the unitary that we want to lean the parity. I have added one paragraph and did not touch the other text