How glasses explore configuration space

Physics – Condensed Matter – Statistical Mechanics

Scientific paper

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To appear in the proceedings of the "3rd workshop on non-equilibrium phenomena in supercooled fluids, glasses and amorphous ma

Scientific paper

10.1088/0953-8984/15/11/312

We review a statistical picture of the glassy state derived from the analysis of the off-equilibrium fluctuation-dissipation relations. We define an ultra-long time limit where ``one time quantities'' are close to equilibrium while response and correlation can still display aging. In this limit it is possible to relate the fluctuation-response relation to static breaking of ergodicity. The resulting picture suggests that even far from that limit, the fluctuation-dissipation ratio relates to the rate of growth of the configurational entropy with free-energy density.

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