Observation of shot-noise-induced asymmetry in the Coulomb blockaded Josephson junction

TL;DR

This paper demonstrates how shot noise affects the IV characteristics of a Coulomb blockaded Josephson junction, revealing increased conductance and asymmetry due to non-Gaussian noise effects.

Contribution

It provides experimental evidence of shot-noise-induced asymmetry and Coulomb blockade modification in Josephson junctions, highlighting non-Gaussian noise influence.

Findings

Zero-bias conductance increases linearly with shot noise power.

IV-curves exhibit growing asymmetry with shot noise.

Coulomb blockade of Cooper pairs is strongly affected by non-Gaussian shot noise.

Abstract

We have investigated the influence of shot noise on the IV-curves of a single mesoscopic Josephson junction. We observe a linear enhancement of zero-bias conductance of the Josephson junction with increasing shot noise power. Moreover, the IV-curves become increasingly asymmetric. Our analysis on the asymmetry shows that the Coulomb blockade of Cooper pairs is strongly influenced by the non-Gaussian character of the shot noise.