Reversible to Irreversible Transitions in Pattern-Forming Systems with Cyclic Interactions

TL;DR

This paper investigates how systems with competing attraction and repulsion forces undergo reversible to irreversible transitions under oscillating conditions, revealing critical points and re-entrant behaviors.

Contribution

It demonstrates that similar reversible-irreversible transitions occur in particle systems with competing interactions, extending understanding beyond non-thermal suspensions.

Findings

Reversible to irreversible transition depends on attraction strength, oscillation frequency, and density.

Re-entrant behavior observed in the reversible state as parameters vary.

System organizes into time-periodic or diffusive states based on oscillation conditions.

Abstract

Transitions from reversible to irreversible or fluctuating states above a critical density and shear amplitude have been extensively studied in non-thermal cyclically sheared suspensions and amorphous solids. Here, we propose that the same type of reversible to irreversible transition occurs for a system of particles with competing short-range attraction and long-range repulsion, which can form crystals, stripes, and bubbles as the ratio of attraction to repulsion varies. By oscillating the strength of the attractive part of the potential, we find that the system can organize into either time-periodic states consisting of nondiffusive complex closed orbits, or into a diffusive fluctuating state. A critical point separates these states as a function of the maximum strength of the attraction, oscillation frequency, and particle density. We also find a re-entrant behavior of the reversible state as a function of the strength of the attraction and the oscillation frequency.