Resonances in the current-voltage characteristics of a dissipative Josephson junction

TL;DR

This paper investigates the sharp resonance peaks in the current-voltage characteristics of a dissipative Josephson junction, modeling the system with a double-well potential and including arbitrary friction effects.

Contribution

It introduces a detailed double-well model with parabolic approximation and incorporates arbitrary friction via a bath of many degrees of freedom to analyze resonance peaks.

Findings

Resonance peaks occur at level crossings in neighboring wells.

The shape and size of peaks depend on the friction strength.

The model captures the influence of dissipation on Josephson junction behavior.

Abstract

The I-V characteristics of a Josephson junction shunted by an Ohmic resistor shows sharp peaks when levels in neighbouring wells are crossing. We consider the shape and size of these peaks using a double-well model where the wells are given in parabolic approximation. The friction of arbitrary strength is included by the help of a bath of infinitely many degrees of freedom.