Frequency resonance in Josephson-junction arrays under strong driving

TL;DR

This paper investigates the resonance phenomena in a 2D frustrated Josephson-junction array under strong AC driving, revealing frequency-dependent signal enhancement and exploring energy dissipation as a stochastic resonance indicator.

Contribution

It introduces an analysis of resonance behavior and SNR enhancement in Josephson-junction arrays driven by high currents, with a focus on dynamic order parameters and energy dissipation.

Findings

Identification of a frequency range with enhanced SNR.

Correlation between dynamic order parameter and resonance behavior.

Work calculation suggests a measure for stochastic resonance.

Abstract

We study resonance behavior of a two-dimensional fully frustrated Josephson-junction array driven by high alternating currents. The signal-to-noise ratio (SNR) is examined as the frequency of the driving current is varied; revealed is a certain frequency range where the SNR is enhanced. Such resonance behavior is explained by considering the dynamic order parameter at zero temperature. We also compute the work, which corresponds to the Ohmic dissipation of the energy due to external currents, and discuss its possibility as a measure of stochastic resonance.