Entropy Production in Nonequilibrium Systems Described by a Fokker-Planck Equation
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| Format: | Artículo científico |
| Language: | en |
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Sociedade Brasileira de Física
2006
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| _version_ | 1866815554503835648 |
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| author | Tânia Tomé |
| author_facet | Tânia Tomé |
| contents | Entropy Production in Nonequilibrium Systems Described by a Fokker-Planck Equation Tânia Tomé Física, Astronomía y Matemáticas Fokker Planck equation Entropy production Irreversible systems We study the entropy production in nonequilibrium systems described by a Fokker-Planck equation. We havedevised an expression for the entropy flux in the stationary state. We have found that the entropy flux can bewritten as an ensemble average of an expression containing the force and its derivative. This result is similar tothe one used by Lebowitz and Spohn for system following a Markovian process in discrete space. We have alsobeen able to obtain a fluctuation-dissipation type relation between the dissipated power, which was written asan ensemble average, and the production of entropy for the case of systems in contact with one heat bath. Wehave applied the results for a simple model for particles subjected to dissipative forces. 2006 artículo científico 0103-9733 https://www.redalyc.org/articulo.oa?id=46436629 en http://www.redalyc.org/revista.oa?id=464 Brazilian Journal of Physics application/pdf Sociedade Brasileira de Física Brazilian Journal of Physics (Brasil) Num.4A Vol.36 |
| format | Artículo científico |
| id | redalyc_46436629 |
| language | en |
| publishDate | 2006 |
| publisher | Sociedade Brasileira de Física |
| spellingShingle | Entropy Production in Nonequilibrium Systems Described by a Fokker-Planck Equation Tânia Tomé Física, Astronomía y Matemáticas Fokker Planck equation Entropy production Irreversible systems Entropy Production in Nonequilibrium Systems Described by a Fokker-Planck Equation Tânia Tomé Física, Astronomía y Matemáticas Fokker Planck equation Entropy production Irreversible systems We study the entropy production in nonequilibrium systems described by a Fokker-Planck equation. We havedevised an expression for the entropy flux in the stationary state. We have found that the entropy flux can bewritten as an ensemble average of an expression containing the force and its derivative. This result is similar tothe one used by Lebowitz and Spohn for system following a Markovian process in discrete space. We have alsobeen able to obtain a fluctuation-dissipation type relation between the dissipated power, which was written asan ensemble average, and the production of entropy for the case of systems in contact with one heat bath. Wehave applied the results for a simple model for particles subjected to dissipative forces. 2006 artículo científico 0103-9733 https://www.redalyc.org/articulo.oa?id=46436629 en http://www.redalyc.org/revista.oa?id=464 Brazilian Journal of Physics application/pdf Sociedade Brasileira de Física Brazilian Journal of Physics (Brasil) Num.4A Vol.36 |
| title | Entropy Production in Nonequilibrium Systems Described by a Fokker-Planck Equation |
| topic | Física, Astronomía y Matemáticas Fokker Planck equation Entropy production Irreversible systems |
| url | https://www.redalyc.org/articulo.oa?id=46436629 |