Parametric Gates

We’ve introduced you to the basic single qubit and multi-qubit gates that are widely used while working on quantum algorithms. However, those gates always perform a fixed operation or a fixed rotation around one of the axes of the Bloch Sphere. What if we wanted to change the state of a qubit to any state of our choice or, perform a rotation on the Bloch Sphere using some arbitrary value? This is where parametric gates come in. Such gates come in handy while working on variational quantum algorithms.