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Title: Relaxation time in disordered molecular systems

Abstract

Relaxation time is the typical time it takes for a closed physical system to attain thermal equilibrium. The equilibrium is brought about by the action of a thermal reservoir inducing changes in the system micro-states. The relaxation time is intuitively expected to increase with system disorder. We derive a simple analytical expression for this dependence in the context of electronic equilibration in an amorphous molecular system model. We find that the disorder dramatically enhances the relaxation time but does not affect its independence of the nature of the initial state.

Authors:
 [1];  [2]
  1. Departamento de Física, Universidade Federal de Santa Catarina, 88040-900 Florianópolis-SC (Brazil)
  2. Departamento de Física, Universidade Federal do Paraná, 81531-990 Curitiba-PR (Brazil)
Publication Date:
OSTI Identifier:
22415862
Resource Type:
Journal Article
Journal Name:
Journal of Chemical Physics
Additional Journal Information:
Journal Volume: 142; Journal Issue: 20; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0021-9606
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; AMORPHOUS STATE; ANALYTICAL SOLUTION; MATHEMATICAL MODELS; MOLECULES; RELAXATION TIME; THERMAL EQUILIBRIUM

Citation Formats

Rocha, Rodrigo P., and Freire, José A., E-mail: jfreire@fisica.ufpr.br. Relaxation time in disordered molecular systems. United States: N. p., 2015. Web. doi:10.1063/1.4921691.
Rocha, Rodrigo P., & Freire, José A., E-mail: jfreire@fisica.ufpr.br. Relaxation time in disordered molecular systems. United States. doi:10.1063/1.4921691.
Rocha, Rodrigo P., and Freire, José A., E-mail: jfreire@fisica.ufpr.br. Thu . "Relaxation time in disordered molecular systems". United States. doi:10.1063/1.4921691.
@article{osti_22415862,
title = {Relaxation time in disordered molecular systems},
author = {Rocha, Rodrigo P. and Freire, José A., E-mail: jfreire@fisica.ufpr.br},
abstractNote = {Relaxation time is the typical time it takes for a closed physical system to attain thermal equilibrium. The equilibrium is brought about by the action of a thermal reservoir inducing changes in the system micro-states. The relaxation time is intuitively expected to increase with system disorder. We derive a simple analytical expression for this dependence in the context of electronic equilibration in an amorphous molecular system model. We find that the disorder dramatically enhances the relaxation time but does not affect its independence of the nature of the initial state.},
doi = {10.1063/1.4921691},
journal = {Journal of Chemical Physics},
issn = {0021-9606},
number = 20,
volume = 142,
place = {United States},
year = {2015},
month = {5}
}