Qiskit, Quantum Computing, Python, Quantum Gate.
orientation of the vector has flipped downwards. Mathematically this is what is happening behind the scenes, As an exercise try and see what would happen if we start with |i⟩. Pauli Z and Y gates Pauli Z gate is a phase flip gate that causes rotation around the z-axis by π radians. Since|0⟩ and |1⟩