Creation and annihilation of fluxons in ac-driven semi-annular Josephson junction

TL;DR

This paper investigates the creation and annihilation of fluxons in a semi-annular Josephson junction under ac-drive, revealing how oscillating potentials influence fluxon dynamics through numerical analysis.

Contribution

It introduces a numerical study of fluxon creation and annihilation in semi-annular Josephson junctions with ac-drive, highlighting effects of non-uniform bias current and oscillating potential.

Findings

Oscillating potential increases depinning current.

Fluxon creation and annihilation demonstrated numerically.

System response to ac-bias characterized for multiple Zero-Field steps.

Abstract

The dynamical behavior of a fluxon in a semi-annular long Josephson junction in the presence of an ac-drive is studied. The non-uniformity due to the non uniform distribution of bias current is investigated. The oscillating potential is found to increase the depinning current. Finite difference method is used for numerical analysis and the response of the system to the ac-bias is studied. The creation and annihilation of fluxon is also demonstrated numerically for the first, second and third Zero-Field step cases.