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Thermodynamics of the glassy state: effective temperature as an additional system parameter

Th. M. Nieuwenhuizen
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Abstract

A system is glassy when the observation time is much smaller than the equilibration time. A unifying thermodynamic picture of the glassy state is presented. Slow configurational modes are in quasi-equilibrium at an effective temperature. It enters thermodynamic relations with the configurational entropy as conjugate variable. Slow fluctuations contribute to susceptibilities via quasi-equilibrium relations, while there is also a configurational term. Fluctuation-dissipation relations also involve the effective temperature. Fluctuations in the energy are non-universal, however. The picture is supported by analytically solving the dynamics of a toy model.

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BibTeXRIS

Th. M. Nieuwenhuizen. 1998-05-06. Thermodynamics of the glassy state: effective temperature as an additional system parameter. https://doi.org/10.1103/physrevlett.80.5580

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