Lifetime of dynamic heterogeneities in a binary Lennard-Jones mixture.
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 subensemble and analyzes its dynamics after some waiting time. The lifetime of the subensemble selected by the four-time correlation function is calculated, and compared to the lifetimes of slow subensembles selected using two different definitions of mobility, and to the alpha relaxation time.
Flenner
Elijah
E
Department of Chemistry, Colorado State University, Fort Collins, CO 80525, USA.
Szamel
Grzegorz
G