Quantum, Quantum Computing, Algebra, Logic Gates.
Z Pauli matrices in the previous illustration, also act as the Y & Z-gates in our quantum circuits: Pauli Y & Z Gates In the Bloch sphere, they respectively represent rotations by π around the y and z-axis. In Qiskit, we can apply the Y and Z-gates to our circuit using: qc.y(0) # Do Y-gate on qubit