Exponential distributions of collective flow-event properties in viscous liquid dynamics

Abstract

We study the statistics of flow events in the inherent dynamics in supercooled two- and three-dimensional binary Lennard-Jones liquids. Distributions of changes of the collective quantities energy, pressure and shear stress become exponential at low temperatures, as does that of the event "size" $S\equiv \sum {d_i}^2$. We show how the $S$-distribution controls the others, while itself following from exponential tails in the distributions of (1) single particle displacements $d$, involving a Lindemann-like length $d_L$ and (2) the number of active particles (with $d>d_L$).

Accepter version (PRL)

References in corpus (2)

• Universal nature of particle displacements close to glass and jamming transitions
• Strong pressure-energy correlations in van der Waals liquids

Cited by in corpus (3)

• Distance-as-time in physical aging
• Deformation of inherent structures to detect long-range correlations in supercooled liquids
• Influence of inherent structure shear stress of supercooled liquids on their shear moduli