Long-lived states of oscillator chain with dynamical traps

TL;DR

This paper investigates a model of oscillator chains with dynamical traps and noise, revealing new non-equilibrium phase transitions and diverse cooperative structures that resemble dynamical phases.

Contribution

It introduces a simple oscillator chain model with dynamical traps, demonstrating novel phase transitions and complex structures through numerical analysis.

Findings

Presence of nonequilibrium phase transitions with symmetry distortions

Particle velocity distributions can be extremely wide or quasi-cusped

Various cooperative structures and superstructures observed

Abstract

A simple model of oscillator chain with dynamical traps and additive white noise is considered. Its dynamics was studied numerically. As demonstrated, when the trap effect is pronounced nonequilibrium phase transitions of a new type arise. Locally they manifest themselves via distortion of the particle arrangement symmetry. Depending on the system parameters the particle arrangement is characterized by the corresponding distributions taking either a bimodal form, or twoscale one, or unimodal onescale form which, however, deviates substantially from the Gaussian distribution. The individual particle velocities exhibit also a number of anomalies, in particular, their distribution can be extremely wide or take a quasi-cusp form. A large number of different cooperative structures and superstructures made of these formations are found in the visualized time patterns. Their evolution is, in some sense, independent of the individual particle dynamics, enabling us to regard them as dynamical phases.