Model $I$--$V$ curves and figures of merit of underdamped deterministic Josephson ratchets

TL;DR

This paper introduces simple analytical models for Josephson ratchets' I-V curves, enabling the calculation of key performance metrics and optimization strategies for these devices.

Contribution

The paper presents analytical models for Josephson ratchets' current-voltage characteristics, including formulas for efficiency and performance optimization.

Findings

Derived analytical expressions for rectification curves and stopping force.

Quantified input/output powers and efficiency of Josephson ratchets.

Provided insights into optimizing ratchet performance.

Abstract

We propose simple models for the current-voltage characteristics of typical Josephson ratchets. We consider the case of a ratchet working against a constant applied counter force and derive analytical expressions for the key characteristics of such a ratchet: rectification curve, stopping force, input and output powers and rectification efficiency. Optimization of the ratchet performance is discussed.