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Activated processes and Inherent Structure dynamics of finite-size mean-field models for glasses

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2000 EDP Sciences
, , Citation A. Crisanti and F. Ritort 2000 EPL 52 640 DOI 10.1209/epl/i2000-00486-2

0295-5075/52/6/640

Abstract

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 (log (t) ∼ N) in mean-field theory automatically includes activated processes opening the way to analytically investigate activated processes by computing corrections beyond mean field.

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10.1209/epl/i2000-00486-2