Techniques for flux-based superconducting qubit readout and related systems and methods

A method comprising:

• controlling a flux bias of a flux qubit such that a first transition frequency corresponding to a level transition of the flux qubit is resonant with a second transition frequency corresponding to a level transition of a superconducting qubit, the superconducting qubit being coupled to the flux qubit via a coupling element;
• applying at least one microwave pulse to the flux qubit that drives the level transition of the flux qubit;
• controlling the flux bias of the flux qubit to generate a persistent current in the flux qubit;
• and
• measuring the persistent current in the flux qubit using a readout system.