Atomtronic circuits using bosonic superfluids have realized stable persistent currents and Josephson effects via ring geometries with controllable critical current and phase slips events by controlling number of Josephson junctions, as demonstrated in theoretical studies of Josephson junction atomtronic necklaces. Fermionic superfluids exhibit Josephson effects across the BEC-BCS crossover, but atomtronic ring circuits with multiple junctions remain unexplored.This thesis will model fermionic Josephson junctions in ring networks, examining how pair-breaking effects—linked to superflow exceeding the pair-breaking velocity—govern current-phase relations, persistent current stability, and dissipation.
Supervisor: Prof. Klejdja Xhani — klejdja.xhani@polito.it