Dependence of the fluctuation-dissipation temperature on the choice of observable
On general grounds, a nonequilibrium temperature can be consistently defined from generalized fluctuation-dissipation relations only if it is independent of the observable considered. We argue that the dependence on the choice of observable generically occurs when the phase-space probability distribution is nonuniform on constant energy shells. We relate quantitatively this observable dependence to a fundamental characteristics of nonequilibrium systems, namely, the Shannon entropy difference with respect to the equilibrium state with the same energy. This relation is illustrated on a mean-field model in contact with two heat baths at different temperatures.
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2009 |
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| Erschienen: |
2009 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:103 |
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| Enthalten in: |
Physical review letters - 103(2009), 26 vom: 31. Dez., Seite 260602 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Martens, Kirsten [VerfasserIn] |
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| Themen: |
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| Anmerkungen: |
Date Completed 28.06.2010 Date Revised 06.04.2010 published: Print-Electronic Citation Status PubMed-not-MEDLINE |
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| Förderinstitution / Projekttitel: |
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| PPN (Katalog-ID): |
NLM197105718 |
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| 100 | 1 | |a Martens, Kirsten |e verfasserin |4 aut | |
| 245 | 1 | 0 | |a Dependence of the fluctuation-dissipation temperature on the choice of observable |
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| 500 | |a Date Revised 06.04.2010 | ||
| 500 | |a published: Print-Electronic | ||
| 500 | |a Citation Status PubMed-not-MEDLINE | ||
| 520 | |a On general grounds, a nonequilibrium temperature can be consistently defined from generalized fluctuation-dissipation relations only if it is independent of the observable considered. We argue that the dependence on the choice of observable generically occurs when the phase-space probability distribution is nonuniform on constant energy shells. We relate quantitatively this observable dependence to a fundamental characteristics of nonequilibrium systems, namely, the Shannon entropy difference with respect to the equilibrium state with the same energy. This relation is illustrated on a mean-field model in contact with two heat baths at different temperatures | ||
| 650 | 4 | |a Journal Article | |
| 700 | 1 | |a Bertin, Eric |e verfasserin |4 aut | |
| 700 | 1 | |a Droz, Michel |e verfasserin |4 aut | |
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