Universal relaxation dynamics of sphere packings below jamming 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 : Ref HAL: hal-02591059_v1 Ref Arxiv: 1904.07359 DOI: 10.1103/PhysRevLett.124.058001 WoS: 000510750600010 Ref. & Cit.: NASA ADS Exporter : BibTex | endNote 2 Citations Résumé: 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. |