Dynamical Superconducting States in Multiterminal Josephson Circuits

Multiterminal Josephson circuits (MTJCs) represent a promising class of devices situated at the crossroads of topology, nonlinear dynamics, and quantum mechanics. Recent studies of MTJCs have unveiled how the interplay between microscopic quantum transport and macroscopic phase dynamics can lead to novel superconducting states. In this talk, I will present both theoretical and experimental insights from our research, highlighting how this dynamic interaction gives rise to phenomena such as fractional Shapiro steps, supercurrent non-reciprocity, and the transport of Cooper multiplets—pairs of Cooper pairs.