Following the evolution of glassy states under external perturbations: compression and shear-strain

Abstract : We consider the adiabatic evolution of glassy states under external perturbations. Although the formalism we use is very general, we focus here on infinite-dimensional hard spheres where an exact analysis is possible. We consider perturbations of the boundary, i.e. compression or (volume preserving) shear-strain, and we compute the response of glassy states to such perturbations: pressure and shear-stress. We find that both quantities overshoot before the glass state becomes unstable at a spinodal point where it melts into a liquid (or yields). We also estimate the yield stress of the glass. Finally, we study the stability of the glass basins towards breaking into sub-basins, corresponding to a Gardner transition. We find that close to the dynamical transition, glasses undergo a Gardner transition after an infinitesimal perturbation.
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Physical Review Letters, American Physical Society, 2014, 〈10.1103/PhysRevLett.114.015701 〉
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Corrado Rainone, Pierfrancesco Urbani, Hajime Yoshino, Francesco Zamponi. Following the evolution of glassy states under external perturbations: compression and shear-strain. Physical Review Letters, American Physical Society, 2014, 〈10.1103/PhysRevLett.114.015701 〉. 〈cea-01463143〉

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