# Tag Info

First note that your $P(\theta)$ and $R_z(\theta)$ gates are the same up to a global phase, so you will not be able to distinguish them. Now, according to qiskit.pulse.ShiftPhase documentation: The qubit phase is tracked in software, enabling instantaneous, nearly error-free Z-rotations by using a ShiftPhase to update the frame tracking the qubit state. So ...