Quantum Computing, Qiskit, General U3 Gate, Controlled U3 Gate, Tutorial.
value is |0⟩. This means, this U3 gate applied on state |0⟩ of our qubit should lead to the column matrix of Eq. (3). Equating individual elements, we get: Eq. (4) Using the value of θ in next equation: We can write this as: Eq. (5) Since, in this case, both the terms having λ were multiplied by 0,