- Universal relaxation dynamics of sphere packings below jamming doi link

Auteur(s): Ikeda A., Kawasaki T., Berthier L., Saitoh Kuniyasu, Hatano Takahiro

(Article) Publié: Physical Review Letters, vol. p.058001 (2020)
Texte intégral en Openaccess : arxiv

Ref HAL: hal-02591059_v1
PMID 32083930
Ref Arxiv: 1904.07359
DOI: 10.1103/PhysRevLett.124.058001
WoS: 000510750600010
Ref. & Cit.: NASA ADS
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We show that non-Brownian suspensions of repulsive spheres below jamming display a slow relaxational dynamics with a characteristic time scale that diverges at jamming. This slow time scale is fully encoded in the structure of the unjammed packing and can be readily measured via the vibrational density of states. We show that the corresponding dynamic critical exponent is the same for randomly generated and sheared packings. Our results show that a wide variety of physical situations, from suspension rheology to algorithmic studies of the jamming transition are controlled by a unique diverging timescale, with a universal critical exponent.