Consider the state |ψ〉 = √2 |0〉 + √2 |1〉 from the previous question. To estimate the phase θ,
we measure |ψ〉 in the sign basis. What is the probability that the outcome of the measurement
is +? Recall that eiθ = cos θ + i sin θ
we measure |ψ〉 in the sign basis. What is the probability that the outcome of the measurement
is +? Recall that eiθ = cos θ + i sin θ
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