Aging in a simple glassformer

Abstract

Using molecular dynamics computer simulations we investigate the out-of-equilibrium dynamics of a Lennard-Jones system after a quench from a high temperature to one below the glass transition temperature. By studying the radial distribution function we give evidence that during the aging the system is very close to the critical surface of mode-coupling theory. Furthermore we show that two-time correlation functions show a strong dependence on the waiting time since the quench and that their shape is very different from the one in equilibrium. By investigating the temperature and time dependence of the frequency distribution of the normal modes we show that the energy of the inherent structures can be used to define an effective (time dependent) temperature of the aging system.

Talk presented at ``Unifying Concepts in Glass Physics'', ICTP, Trieste 15 - 18 September 1999; 12 pages of Latex

References in corpus (3)

• Inherent Structure Entropy of Supercooled Liquids
• Aging as dynamics in configuration space
• Fluctuations, response and aging dynamics in a simple glass-forming liquid out of equilibrium

Cited by in corpus (19)

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• On the Rigidity of Amorphous Solids
• Geometric interpretation of pre-vitrification in hard sphere liquids
• Heterogeneous Dynamics, Marginal Stability and Soft Modes in Hard Sphere Glasses
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• Supercooled Liquids Under Shear: Theory and Simulation
• Dynamics and structure of an aging binary colloidal glass
• Introduction to molecular dynamics simulations
• Slow relaxations and stringlike jump motions in fragile glass-forming liquids: Breakdown of the Stokes-Einstein relation
• Mode-coupling theory and the fluctuation-dissipation theorem for nonlinear Langevin equations with multiplicative noise
• Correlations of Structure and Dynamics in an Aging Colloidal Glass
• The glass transition of two-dimensional binary soft disk mixtures with large size ratios
• The nature of slow dynamics in a minimal model of frustration-limited domains
• Slow coarsening in jammed athermal soft particle suspensions
• The Ratchet effect in an ageing glass
• Classifying the age of a glass based on structural properties: A machine learning approach
• Instantaneous normal modes of glass-forming liquids during the athermal relaxation process of the steepest descent algorithm
• Bringing together two paradigms of non-equilibrium: Fragile versus robust aging in driven glassy systems
• The glass susceptibility: growth kinetics and saturation under shear