Zaccarelli, EmanuelaFoffi, GiuseppeSciortino, FrancescoTartaglia, Piero2010-01-282010-01-282010-01-28200310.1103/PhysRevLett.91.108301https://infoscience.epfl.ch/handle/20.500.14299/46282We study—using molecular dynamics simulations—the temperature dependence of the dynamics in a dense short-ranged attractive colloidal glass to find evidence of the kinetic glass-glass transition predicted by the ideal mode coupling theory. According to the theory, the two distinct glasses are stabilized, one by excluded volume and the other by short-ranged attractive interactions. By studying the density autocorrelation functions, we discover that the short-ranged attractive glass is unstable. Indeed, activated bond-breaking processes slowly convert the attractive glass into the hard-sphere one, preempting the observation of a sharp glass-glass transition.text::journal::journal article::research article