Fluctuation theorem for an optically trapped tracer in dense colloids. A simulation study

The work supplied by an external parabolic potential that traps one tracer in a colloidal system is studied in this work by computer simulations. The density of the bath is changed from zero up to values close to the glass transition, and the velocity varies over several decades from the linear beha...

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Main Author: Puertas Antonio M.
Format: Article
Language:English
Published: EDP Sciences 2013-03-01
Series:EPJ Web of Conferences
Online Access:http://dx.doi.org/10.1051/epjconf/20134404001
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spelling doaj-6c56da55050c45f0a06a7bd9a85a951c2021-08-02T04:04:48ZengEDP SciencesEPJ Web of Conferences2100-014X2013-03-01440400110.1051/epjconf/20134404001Fluctuation theorem for an optically trapped tracer in dense colloids. A simulation studyPuertas Antonio M.The work supplied by an external parabolic potential that traps one tracer in a colloidal system is studied in this work by computer simulations. The density of the bath is changed from zero up to values close to the glass transition, and the velocity varies over several decades from the linear behaviour in the low Peclet limit to the high Peclet limit. The work distributions are analyzed using the model for the isolated Brownian partice, where the friction coefficient and temperature of the medium have been fitted to reproduce the position distribution of the tracer in the trap. The overall agreement is good but not perfect. The region of negative works is studied in more detail using the predictions of the fluctuation theorem, finding good qualitative agreement with the model of the isolated Brownian particle. The present results indicate that the fluctuation theorem is of application in cases where the tracer dynamics is complex, as predicted by theoretical works. http://dx.doi.org/10.1051/epjconf/20134404001
collection DOAJ
language English
format Article
sources DOAJ
author Puertas Antonio M.
spellingShingle Puertas Antonio M.
Fluctuation theorem for an optically trapped tracer in dense colloids. A simulation study
EPJ Web of Conferences
author_facet Puertas Antonio M.
author_sort Puertas Antonio M.
title Fluctuation theorem for an optically trapped tracer in dense colloids. A simulation study
title_short Fluctuation theorem for an optically trapped tracer in dense colloids. A simulation study
title_full Fluctuation theorem for an optically trapped tracer in dense colloids. A simulation study
title_fullStr Fluctuation theorem for an optically trapped tracer in dense colloids. A simulation study
title_full_unstemmed Fluctuation theorem for an optically trapped tracer in dense colloids. A simulation study
title_sort fluctuation theorem for an optically trapped tracer in dense colloids. a simulation study
publisher EDP Sciences
series EPJ Web of Conferences
issn 2100-014X
publishDate 2013-03-01
description The work supplied by an external parabolic potential that traps one tracer in a colloidal system is studied in this work by computer simulations. The density of the bath is changed from zero up to values close to the glass transition, and the velocity varies over several decades from the linear behaviour in the low Peclet limit to the high Peclet limit. The work distributions are analyzed using the model for the isolated Brownian partice, where the friction coefficient and temperature of the medium have been fitted to reproduce the position distribution of the tracer in the trap. The overall agreement is good but not perfect. The region of negative works is studied in more detail using the predictions of the fluctuation theorem, finding good qualitative agreement with the model of the isolated Brownian particle. The present results indicate that the fluctuation theorem is of application in cases where the tracer dynamics is complex, as predicted by theoretical works.
url http://dx.doi.org/10.1051/epjconf/20134404001
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