Asaph Widmer-Cooper and Peter Harrowell 2005 J. Phys.: Condens. Matter 17 S4025 doi:10.1088/0953-8984/17/49/001
Asaph Widmer-Cooper and Peter Harrowell
Show affiliationsWe present the dynamic propensity distribution as an explicit measure of the degree to which the dynamics in a liquid over the time scale of structural relaxation is determined by the initial configuration. We then examine, for a binary mixture of soft discs in two dimensions, the correlation between the spatial distribution of propensity and that of two local measures of configuration structure: the local composition and local free volume. While the small particles dominate the high propensity population, we find no strong correlation between either the local composition or the local free volume and the propensity. It is argued that this is a generic failure of purely local structural measures to capture the inherently non-local character of collective behaviour.
Issue 49 (14 December 2005)
Received 14 June 2005, in final form 22 August 2005
Published 25 November 2005
Asaph Widmer-Cooper and Peter Harrowell 2005 J. Phys.: Condens. Matter 17 S4025
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