Out-of-equilibrium jamming of liquids and glasses: memory and criticality

The emergence of memory in glass-forming liquids has recently been described by mean-field theory. Liquids equilibrated below the onset packing fraction (or above the onset temperature) share the same set of inherent states, while on the other side of that onset the set of inherent states depends on the equilibrated liquid properties. The resulting jammed states then have memory of the original liquid. In this talk, we present a new method to jam hard sphere liquids efficiently, which enables us to reliably detect this onset and relate its value with the mean-field prediction. This jamming algorithm also exhibits a signature of an out-of-equilibrium Gardner transition, corresponding to the point at which the roughness of the optimization landscape becomes algorithmically notable. Taken together these results will help inform a theory of out-of-equilibrium liquids and glasses.