Universality in lattice models of dynamic arrest: Introduction of an order parameter

被引:56
作者
Lawlor, A [1 ]
Reagan, D
McCullagh, GD
De Gregorio, P
Tartaglia, P
Dawson, KA
机构
[1] Univ Coll Dublin, Dept Chem, Irish Ctr Colloid Sci & Biomat, Dublin 4, Ireland
[2] Univ Michigan, Dept Chem Engn, Ann Arbor, MI 48109 USA
[3] Univ Roma La Sapienza, Dipartimento Fis, I-00185 Rome, Italy
[4] ISt Nazl Fis Mat SMC, Unita Roma La Sapienza, I-00185 Rome, Italy
关键词
D O I
10.1103/PhysRevLett.89.245503
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
We introduce an order parameter for dynamical arrest. Dynamically available volume (unoccupied space that is available to the motion of particles) is expressed as holes for the simple lattice models we study. Near the arrest transition the system is dilute in holes, so we expand dynamical quantities in a series of hole density. Unlike the situation when presented in particle density, all cases of simple models that we examine have a quadratic dependence of the diffusion constant on hole density. This observation implies that in certain regimes ideal dynamical arrest transitions may possess a hitherto unnoticed degree of universality.
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页数:4
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