We use computer simulation to investigate the topology of the potential
energy V({R}) and to search for doublewell potential's (DWP) in a
model glass . By a sequence of Newtonian and dissipative dynamics we find
different minima of V({R}) and the energy profile along the least
action paths joining them. At variance with previous suggestions, we find that
the parameters describing the DWP's are correlated among each others. Moreover,
the trajectory of the system in the 3N-d configurational phase space follows
a quasi-1-d manifold. The motion parallel to the path is characterized by jumps
between minima, and is nearly uncorrelated from the orthogonal, harmonic,
dynamics.Comment: 4 pages, RevTex, 4 PostScript figure