Observation of nonlocal Josephson effect on double InAs nanowires

TL;DR

This paper reports the experimental observation of a nonlocal Josephson effect in double InAs nanowires, demonstrating coherent coupling between two Josephson junctions through shared superconducting electrodes.

Contribution

First experimental evidence of nonlocal Josephson effect in double InAs nanowires, advancing understanding of coherent coupling in superconducting nanostructures.

Findings

Observation of switching current oscillations controlled by nonlocal phase difference

Evidence of short-range coherent coupling between Josephson junctions

Potential for engineering novel superconducting phenomena

Abstract

Short-range coherent coupling of two Josephson junctions (JJs) are predicted to generate a supercurrent in one JJ nonlocally modulated by the phase difference in the other. We report on observation of the nonlocal Josephson effect on double InAs nanowires as experimental evidence of the coherent coupling. We measured one JJ sharing one superconducting electrode with the other JJ and observed switching current oscillation as a control of the nonlocal phase difference. Our result is an important step toward engineering of novel superconducting phenomena with the short-range coherent coupling.