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- W2107777166 abstract "We numerically examine dynamical heterogeneity in a highly supercooled three-dimensional liquid via molecular-dynamics simulations. To define the local dynamics, we consider two time intervals, $tau_alpha$ and $tau_{text{ngp}}$. $tau_alpha$ is the $alpha$ relaxation time, and $tau_{text{ngp}}$ is the time at which non-Gaussian parameter of the van Hove self-correlation function is maximized. We determine the lifetimes of the heterogeneous dynamics in these two different time intervals, $tau_{text{hetero}}(tau_alpha)$ and $tau_{text{hetero}}(tau_{text{ngp}})$, by calculating the time correlation function of the particle dynamics, i.e., the four-point correlation function. We find that the difference between $tau_{text{hetero}}(tau_alpha)$ and $tau_{text{hetero}}(tau_{text{ngp}})$ increases with decreasing temperature. At low temperatures, $tau_{text{hetero}}(tau_alpha)$ is considerably larger than $tau_{alpha}$, while $tau_{text{hetero}}(tau_{text{ngp}})$ remains comparable to $tau_{alpha}$. Thus, the lifetime of the heterogeneous dynamics depends strongly on the time interval." @default.
- W2107777166 created "2016-06-24" @default.
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- W2107777166 date "2010-06-18" @default.
- W2107777166 modified "2023-10-18" @default.
- W2107777166 title "Life time of heterogeneous dynamics in a highly supercooled liquid : effect of time intervals" @default.
- W2107777166 hasPublicationYear "2010" @default.
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