Flux- and tunnel-parity-controlled Josephson nonreciprocity from singlet-triplet competition in a parallel double quantum dot
The paper investigates how nonreciprocal supercurrents occur in interacting quantum dots by studying competition between singlet and triplet states in a double quantum dot Josephson junction. It shows that orbital flux and tunnel parity control which state dominates, leading to different transport behaviors and rectification efficiencies.