Multiparticle tunneling transport at strongly correlated interfaces

田島 裕之*; 大上 能悟*; 松尾 衛

Physical Review A, 106(3), p.033310_1 - 033310_8, 2022/09

https://doi.org/10.1103/PhysRevA.106.033310

We elucidate the multiparticle transport of pair tunneling and spin tunneling in strongly correlated interfaces. Not only usual single-particle tunneling but also interaction-induced multiparticle tunneling processes naturally arise from a conventional microscopic model without any empirical parameters, through the overlap of the many-body wave functions around the interface. We demonstrate how anomalous tunneling currents occur in a strongly interacting system due to the pair-tunneling process which we derived microscopically. Our formulation is useful for junction systems in various disciplines, including atomtronics, spintronics, and nuclear reactions.