Josephson current through a quantum dot with spin-orbit coupling

Abstract

The equilibrium Josephson current through a nanoscale multilevel quantum dot with Rashba or Dresselhaus spin-orbit coupling $\ensuremath{\alpha}$ has been computed. The critical current can be drastically modified already by moderate $\ensuremath{\alpha}$. In the presence of a Zeeman field, Datta-Das-like oscillatory dependencies on $\ensuremath{\alpha}$ are predicted.