Kovacs Effect in a Fragile Glass Model

Abstract

The Kovacs protocol, based on the temperature shift experiment originally conceived by A.J. Kovacs for glassy polymers, is implemented in an exactly solvable dynamical model. This model is characterized by interacting fast and slow modes represented respectively by spherical spins and harmonic oscillator variables. Due to this fundamental property, the model reproduces the characteristic non-monotonic evolution known as the ``Kovacs effect'', observed in polymers, in granular materials and models of molecular liquids, when similar experimental protocols are implemented.

8 pages, 6 figures

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• Memory effects in the relaxation of the Gaussian trap model
• The Kovacs effect in the one-dimensional Ising model: a linear response analysis
• Strong non-exponential relaxation and memory effects in a fluid with non-linear drag
• Kovacs-like memory effect in athermal systems: linear response analysis
• Memory Effects in the Standard Model for Glasses
• Memory effects in glasses: insights into the thermodynamics of out of equilibrium systems revealed by a simple model of the Kovacs effect
• Non-equilibrium memory effects: granular fluids and beyond
• Kovacs Effect in Glass with Material Memory Revealed in Non-Equilibrium Particle Interactions
• Linear response in the uniformly heated granular gas
• Kovacs effect in solvable model glasses
• Kinetic glass transition in granular gases and non-linear molecular fluids
• Memory Control of Ice Growth During Non-Equilibrium Freezing of Water