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Which of the following pairs of quantum gates commute? Select all that apply. (Gates A and B commute if and only if for any input applying A and then B gives the same results as applying B and then A. This is the same as saying that the unitary transformations commute.)

  • Physics -

    3 of them commute
    I and X
    CNOT and X applied to the target qubit
    Real rotation by 30∘ and real rotation by 45∘

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