Local external signal shows larger effectiveness when imposed on the fast components in an array of inductively coupled Josephson junctions

TL;DR

The study demonstrates that in an array of inductively coupled Josephson junctions, applying a small periodic signal to the fast component significantly influences the entire array, unlike when applied to slower components.

Contribution

It reveals that external signals are more effective when imposed on the fast components of Josephson junction arrays, highlighting the importance of component dynamics in signal detection.

Findings

Signal detection is enhanced on fast junctions with smaller critical current.

Imposing signals on slow components has minimal effect on the array.

Fast impurities act as effective points for external signal influence.

Abstract

An array of inductively coupled Josephson junctions is considered and it is shown that in presence of a fast impurity which is a junction with a smaller value of critical current, a small amplitude periodic signal can be detected all elsewhere in the array, when is imposed on the fast component. On the other hand, small amplitude signals which are imposed on the other oscillators in the array have minor effect on the dynamics of the whole