%0 Journal Article
%T Activated aging dynamics and negative fluctuation-dissipation ratios
%+ Laboratoire des colloïdes, verres et nanomatériaux (LCVN)
%A Mayer, Peter
%A Léonard, Sébastien
%A Berthier, Ludovic
%A Garrahan, Juan P.
%A Sollich, Peter
%Z 4 pages, 4 figs; v2 final version (minor modifs) published in Phys. Rev. Lett
%< avec comité de lecture
%@ 0031-9007
%J Physical Review Letters
%I American Physical Society
%V 96
%P 030602
%8 2006-01-25
%D 2006
%Z cond-mat/0508686
%R 10.1103/PhysRevLett.96.030602
%Z Physics [physics]/Condensed Matter [cond-mat]/Statistical Mechanics [cond-mat.stat-mech]Journal articles
%X In glassy materials aging proceeds at large times via thermal activation. We show that this can lead to negative dynamical response functions and novel and well-defined violations of the fluctuation-dissipation theorem, in particular, negative fluctuation-dissipation ratios. Our analysis is based on detailed theoretical and numerical results for the activated aging regime of simple kinetically constrained models. The results are relevant to a variety of physical situations such as aging in glass-formers, thermally activated domain growth and granular compaction.
%G English
%L hal-00115937
%U https://hal.science/hal-00115937
%~ CNRS
%~ UNIV-MONTP2
%~ LCVN
%~ UNIV-MONTPELLIER
%~ UM1-UM2