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Multiple choice
For
A
=
[
0
1
1
0
]
A = \begin{bmatrix}0 & 1 \\ 1 & 0\end{bmatrix}
A
=
[
0
1
1
0
]
(the X gate) and
B
=
[
1
0
0
−
1
]
B = \begin{bmatrix}1 & 0 \\ 0 & -1\end{bmatrix}
B
=
[
1
0
0
−
1
]
(the Z gate), what is the
(
0
,
1
)
(0, 1)
(
0
,
1
)
entry of the product
A
B
AB
A
B
?
−1
1
0
2
Check answer