SciPost Phys. 12, 017 (2022) ·
published 12 January 2022
The multi-terminal Josephson effect allows DC supercurrent to flow at finite
commensurate voltages. Existing proposals to realize this effect rely on
nonlocal Andreev processes in superconductor-normal-superconductor junctions.
However, this approach requires precise control over microscopic states and is
obscured by dissipative current. We show that standard tunnel Josephson
circuits also support multiplet supercurrent mediated only by local tunneling
processes. Furtheremore, we observe that the supercurrents persist even in the
high charging energy regime in which only sequential Cooper transfers are
allowed. Finally, we demonstrate that the multiplet supercurrent in these
circuits has a quantum geometric component that is distinguinshable from the
well-known adiabatic contribution.