Nonuniversality of density and disorder in jammed sphere packings

Yang Jiao, Frank H. Stillinger, Salvatore Torquato

Research output: Contribution to journalArticlepeer-review

47 Scopus citations


We show for the first time that collectively jammed disordered packings of three-dimensional monodisperse frictionless hard spheres can be produced and tuned using a novel numerical protocol with packing density ø as low as 0.6. This is well below the value of 0.64 associated with the maximally random jammed state and entirely unrelated to the ill-defined "random loose packing" state density. Specifically, collectively jammed packings are generated with a very narrow distribution centered at any density ø over a wide density range φepsi;(0.6,0.740 48⋯) with variable disorder. Our results support the view that there is no universal jamming point that is distinguishable based on the packing density and frequency of occurrence. Our jammed packings are mapped onto a density-order-metric plane, which provides a broader characterization of packings than density alone. Other packing characteristics, such as the pair correlation function, average contact number, and fraction of rattlers are quantified and discussed.

Original languageEnglish (US)
Article number013508
JournalJournal of Applied Physics
Issue number1
StatePublished - Jan 1 2011
Externally publishedYes

ASJC Scopus subject areas

  • General Physics and Astronomy


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