Question R11 Q1 - NSB Round Robin 2020

Scientists at Oak Ridge National Lab have designed a particular implementation of a controlled-NOT, or CNOT, gate to enable future work in quantum information processing. In general, if the TARGET qubit is ket 1, which of the following is a transformation that can be performed by the CNOT gate?

W) If the CONTROL qubit is ket 0, the target qubit will remain ket 1

X) If the CONTROL qubit is ket 0, the target qubit will become ket 0

Y) It will always remain ket 1

Z) It will always become ket 0

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