2005/11/28 by Gerardo Aquino, Luca Leuzzi, Theo M. Nieuwenhuizen · 1 citation
Materials Science · Mathematics · Physics and Astronomy · #Advanced Thermodynamics and Statistical Mechanics #Condensed matter physics #Harmonic #Harmonic oscillator #Material Dynamics and Properties #Mathematical analysis #Mathematics #Monotonic function #Nuclear magnetic resonance #Physics #Polymer #Quantum mechanics #Spins #Statistical physics #Theoretical and Computational Physics #cond-mat.dis-nn #cond-mat.stat-mech
paper · pdf · doi:10.1103/physrevb.73.094205
published as Phys. Rev. B 73, 094205 (2006) · 8 pages, 6 figures
arxiv created 2005/11/28 · openalex publication_date 2006/03/28 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
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 nonmonotonic evolution known as the ``Kovacs effect,'' observed in polymers, spin glasses, granular materials, and molecular liquid models, when similar experimental protocols are implemented.