Multiple scaling regimes in simple aging models

We investigate aging in glassy systems based on a simple model, where a poi nt in configuration space performs thermally activated jumps between the mi nima of a random energy landscape. The model allows us to show explicitly a subaging behavior and multiple scaling regimes for the correlation functio n. Both the exponents characterizing the scaling of the different relaxatio n times with the waiting time and those characterizing the asymptotic decay of the scaling functions are obtained analytically by invoking a "partial equilibrium" concept.