Nonlocal supercurrent of quartets in a three-terminal Josephson junction

Yonatan Cohen, Yuval Ronen, Jung-Hyun Kang, Moty Heiblum, Denis Feinberg, Régis Mélin, Hadas Shtrikman
2018 Proceedings of the National Academy of Sciences of the United States of America  
We report an observation of a new, non dissipative and non local supercurrent, carried by quartets; each consisting of four entangled electrons. The supercurrent is a result of a novel Andreev bound state (ABS), formed among three superconducting terminals. While in a two-terminal Josephson junction the usual ABS, and thus the DC Josephson current, exist only in equilibrium, in the present realization the ABS exists also in the strongly nonlinear regime (biased terminals). The presence of
more » ... e presence of supercurrent carried by quartets was established by performing non-local conductance and cross-correlation of current fluctuations measurements, in different devices made of aluminum-InAs nanowire junctions. An extensive and detailed theoretical study is intertwined with the experimental results.
doi:10.1073/pnas.1800044115 pmid:29915041 fatcat:izyyxt6a6jgx5dn6mrmvktc4cm