Lifetime of dynamic heterogeneities in a binary Lennard-Jones mixture

Abstract

A four-time correlation function was calculated using a computer simulation of a binary Lennard-Jones mixture. The information content of the four-time correlation function is similar to that of four-time correlation functions measured in NMR experiments. The correlation function selects a sub-ensemble and analyzes its dynamics after some waiting time. The lifetime of the sub-ensemble selected by the four-time correlation function is calculated, and compared to the lifetimes of slow sub-ensembles selected using two different definitions of mobility, and to the $\alpha$ relaxation time.

arXiv commentaccepted for publication in Phys. Rev. E

References in corpus (9)

• Testing Mode-Coupling Theory for a Supercooled Binary Lennard-Jones Mixture I: The van Hove Correlation Function
• Dynamical heterogeneities in a supercooled Lennard-Jones liquid
• String-like Clusters and Cooperative Motion in a Model Glass-Forming Liquid
• Testing Mode-Coupling Theory for a Supercooled Binary Lennard-Jones Mixture II: Intermediate Scattering Function and Dynamic Susceptibility
• Spatial Correlations of Mobility and Immobility in a Glassforming Lennard-Jones Liquid
• How does the relaxation of a supercooled liquid depend on its microscopic dynamics?
• Dynamical Heterogeneities Below the Glass Transition
• Independence of the relaxation of a supercooled fluid of its microscopic dynamics: need for yet another extension of the mode-coupling theory
• How do dynamic heterogeneities evolve in time?

Cited by in corpus (11)

• Relaxation in a glassy binary mixture: Mode-coupling-like power laws, dynamic heterogeneity and a new non-Gaussian parameter
• Multiple length and time scales of dynamic heterogeneities in model glass-forming liquids: A systematic analysis of multi-point and multi-time correlations
• Multi-time density correlation functions in glass-forming liquids: Probing dynamical heterogeneity and its lifetime
• Time scale for the onset of Fickian diffusion in supercooled liquids
• Dynamical heterogeneity in a highly supercooled liquid: Consistent calculations of correlation length, intensity, and lifetime
• Multiple time scales hidden in heterogeneous dynamics of glass-forming liquids
• Frequency dependence of specific heat in supercooled liquid water and emergence of correlated dynamics
• Lifetime of dynamic heterogeneity in strong and fragile kinetically constrained spin models
• Lifetime of dynamical heterogeneity in a highly supercooled liquid
• Dynamical Heterogeneity in a Highly Supercooled Liquid under a Sheared Situation
• Kerr effect as a tool for the investigation of dynamic heterogeneities