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A qubit
∣
ψ
⟩
=
α
∣
0
⟩
+
β
∣
1
⟩
|\psi\rangle = \alpha|0\rangle + \beta|1\rangle
∣
ψ
⟩
=
α
∣0
⟩
+
β
∣1
⟩
has the amplitude of
∣
1
⟩
|1\rangle
∣1
⟩
equal to
1
/
2
1/2
1/2
. What is the probability of measuring
∣
1
⟩
|1\rangle
∣1
⟩
?
1
1
/
2
=
0.5
1/2 = 0.5
1/2
=
0.5
1
/
4
=
0.25
1/4 = 0.25
1/4
=
0.25
1
/
2
1/\sqrt{2}
1/
2
≈ 0.707
Check answer