Abstract
The ageing dynamics of a simple model glass are numerically investigated by observing how they occur in the potential energy landscape. Partitioning the landscape in basins of minima of |δV|2, we are able to elucidate some interesting topological properties of the ageing process. The main result is the characterization of the long-time behaviour as jump dynamics between basins of attraction of minima. Moreover we extract some information about the landscape itself, determining quantitatively a few parameters describing it, such as the mean energy barrier value and the mean square distance between adjacent minima.