Forced deterministic dynamics on a random energy landscape: Implications for the physics of amorphous solids

Asaf Szulc, Omri Gat, Ido Regev

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

Abstract

The dynamics of supercooled liquids and plastically deformed amorphous solids is known to be dominated by the structure of their rough energy landscapes. Recent experiments and simulations on amorphous solids subjected to oscillatory shear at athermal conditions have shown that for small strain amplitudes these systems reach limit cycles of different periodicities after a transient. However, for larger strain amplitudes the transients become longer and for strain amplitudes exceeding a critical value the system reaches a diffusive steady state. This behavior cannot be explained using the current mean-field models of amorphous plasticity. Here we show that this phenomenology can be described and explained using a simple model of forced dynamics on a multidimensional random energy landscape. In this model, the existence of limit cycles can be ascribed to confinement of the dynamics to a small part of the energy landscape which leads to self-intersection of state-space trajectories and the transition to the diffusive regime for larger forcing amplitudes occurs when the forcing overcomes this confinement.

Original languageEnglish
Article number052616
JournalPhysical Review E
Volume101
Issue number5
DOIs
StatePublished - 1 May 2020

ASJC Scopus subject areas

  • Statistical and Nonlinear Physics
  • Statistics and Probability
  • Condensed Matter Physics

Fingerprint

Dive into the research topics of 'Forced deterministic dynamics on a random energy landscape: Implications for the physics of amorphous solids'. Together they form a unique fingerprint.

Cite this