Transport and noise properties of Ferromagnetic Josephson junctions at the 𝟎− 𝝅 transition.

Ferromagnetic Josephson junctions are object of intense research activity. Due to the competition between superconducting and ferromagnetic ordering, these platforms host many intriguing phenomena such as 0 − π transitions and spin-triplet superconducting correlations. The former consist in a shift of π in the equilibrium junction phase, whose typical experimental signature is a cusp-like critical current vs. temperature behavior, i.e. IC(T). 0 − π transitions are necessary for the realization of so-called π junctions, that may possibly employed in novel designs for self-biased flux and phase qubits. On the other hand, the capability to generate and control spin-triplet supercurrents paves the way to novel spin-filter junctions as building blocks for the emerging field of superconducting spintronics. More recently, junctions where the ferromagnetic layer is insulating, which are more suitable for quantum circuits applications in view of their low dissipation, have been theoretically and experimentally studied. Possibility to induce peculiar temperature induced 0 − π transitions has been predicted and investigated, while experimental signatures of spin-triplet transport have been provided. Our contribution to the characterization of ferromagnetic Josephson junctions concerns the study of both their transport and noise properties at the 0 − π transition.