Hybrid ferromagnetic transmon qubit: Circuit design, feasibility, and detection protocols for magnetic fluctuations

We propose to exploit currently available tunnel ferromagnetic Josephson junctions realize a hybrid superconducting qubit. show that the characteristic hysteretic behavior of barrier provides an alternative and intrinsically digital tuning qubit frequency by means magnetic field pulses. To illustrate functionalities limitation device, we discuss coupling readout resonator effect fluctuations. The possibility use as noise detector its relevance investigate subtle interplay magnetism superconductivity is envisaged.