Volume 52, Number 6, December II 2000
|Page(s)||640 - 646|
|Section||Condensed matter: structure, mechanical and thermal properties|
|Published online||01 September 2002|
Activated processes and Inherent Structure dynamics of finite-size mean-field models for glasses
Dipartimento di Fisica, Università di Roma "La Sapienza”
and INFM Unità di Roma I -
P.le Aldo Moro 2, I-00185 Roma, Italy
2 Physics Department, Faculty of Physics, University of Barcelona Diagonal 647, 08028 Barcelona, Spain
Accepted: 11 October 2000
We investigate the Inherent Structure (IS) dynamics of mean-field finite-size spin-glass models whose high-temperature dynamics is described in the thermodynamic limit by the schematic Mode Coupling Theory for supercooled liquids. Near the threshold energy the dynamics is ruled by activated processes which induce a logarithmic slow relaxation. We show the presence of aging in both the IS correlation and integrated response functions and check the validity of the one-step replica symmetry breaking scenario in the presence of activated processes. Our work shows: 1) the violation of the fluctuation-dissipation theorem can be computed from the configurational entropy obtained in the Stillinger and Weber approach, 2) the intermediate time regime () in mean-field theory automatically includes activated processes opening the way to analytically investigate activated processes by computing corrections beyond mean field.
PACS: 64.70.Pf – Glass transitions / 75.10.Nr – Spin-glass and other random models / 61.20.Gy – Theory and models of liquid structure
© EDP Sciences, 2000
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