Qiskit, Quantum Computing, Python, Quantum Gate.
form: Here ϕ describes the relative phase and its values range from [0,2π]. On the other hand, θ ∈ [0,π] determines the probability that the measurement results in |0⟩ or |1⟩. We had seen that all normalized pure states can be illustrated on the surface of a sphere with radius |r| = 1 which we call