Search for hyperuniformity in mechanically stable packings of frictionless disks above jamming
2015 (English)In: Physical Review E. Statistical, Nonlinear, and Soft Matter Physics, ISSN 1539-3755, E-ISSN 1550-2376, Vol. 92, no 5, 052206Article in journal (Refereed) PublishedText
We numerically simulate mechanically stable packings of soft-core, frictionless, bidisperse disks in two dimensions, above the jamming packing fraction phi(J). For configurations with a fixed isotropic global stress tensor, we investigate the fluctuations of the local packing fraction phi(r) to test whether such configurations display the hyperuniformity that has been claimed to exist exactly at phi(J). For our configurations, generated by a rapid quench protocol, we find that hyperuniformity persists only out to a finite length scale and that this length scale appears to remain finite as the system stress decreases towards zero, i.e., towards the jamming transition. Our result suggests that the presence of hyperuniformity at jamming may be sensitive to the specific protocol used to construct the jammed configurations.
Place, publisher, year, edition, pages
American Physical Society , 2015. Vol. 92, no 5, 052206
Fusion, Plasma and Space Physics
IdentifiersURN: urn:nbn:se:umu:diva-113729DOI: 10.1103/PhysRevE.92.052206ISI: 000365871500009OAI: oai:DiVA.org:umu-113729DiVA: diva2:890029