Hierarchical landscape of hard disk glasses Auteur(s): Liao Qinyi, Berthier L. (Article) Publié: Physical Review X, vol. 9 p.011049 (2019) Texte intégral en Openaccess : Ref HAL: hal-02092636_v1 Ref Arxiv: 1810.10256 DOI: 10.1103/PhysRevX.9.011049 WoS: 000461916500001 Ref. & Cit.: NASA ADS Exporter : BibTex | endNote 9 Citations Résumé: We numerically analyse the landscape governing the evolution of the vibrational dynamics of hard disk glasses as the density increases towards jamming. We find that the dynamics becomes slow, spatially correlated, and starts to display aging dynamics across an avoided Gardner transition, with a phenomenology that resembles three dimensional observations. We carefully analyse the behaviour of single glass samples, and find that the emergence of aging dynamics is controlled by the apparition of a complex organisation of the landscape that splits into a remarkable hierarchy of minima as jamming is approached. Our results show that the mean-field prediction of a Gardner phase characterized by an ultrametric structure of the landscape provides a useful description of finite dimensional systems, even when the Gardner transition is avoided. |