Posted by unknown on Sunday, February 24, 2013 at 8:48pm.
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  Russel, Thursday, August 29, 2013 at 1:49pm
3 of them commute
I and X
CNOT and X applied to the target qubit
Real rotation by 30∘ and real rotation by 45∘