abstract

• We employ the principle of dynamic equivalence between soft-sphere and hard-sphere fluids to describe the interplay of the effects of varying the density n, the temperature T, and the softness (characterized by a softness parameter ν-1) on the dynamics of glass-forming soft-sphere liquids in terms of simple scaling rules. The main prediction is the existence of a dynamic universality class associated with the hard-sphere fluid, constituted by the soft-sphere systems whose dynamic parameters depend on n, T, and ν only through the reduced density n*nσ HS(T*,ν). A number of scaling properties observed in recent experiments and simulations involving glass-forming fluids with repulsive short-range interactions are found to be a direct manifestation of this general dynamic equivalence principle. © 2011 American Physical Society.

authors

• Acuña-Campa H.
• López Flores Leticia
• Medina Noyola Magdaleno
• Ramírez González Pedro Ezequiel

publication date

• 2011-01-01

published in

• Physical Review Letters  Journal

keywords

• Dynamic equivalence; Dynamic parameters; General dynamics; Glass-forming; Hard sphere fluids; Scaling properties; Scaling rules; Short range interactions; Universality class; Dynamics; Fluids; Glass; Spheres; Density of liquids

Digital Object Identifier (DOI)

• 10.1103/PhysRevLett.107.155701

start page

end page

volume

• 107

issue

• 15