Stochastic thermodynamics of nonequilibrium steady states in chemical reaction systems

Chung Yuan Mou, Jiu Li Luob, Grégoire Nicolis

研究成果: 雜誌貢獻文章同行評審

58 引文 斯高帕斯(Scopus)

摘要

We present a stochastic theory of entropy production for steady states in chemical reaction systems. Small scale internal fluctuations around steady states are considered in the Gaussian regime. It is shown that in addition to the usual Gibbsian form of entropy production, there is an entropy production due to fluctuation which is of order O(V0). This comes from the non-Poisson character of the probability distribution in a nonequilibrium system. Two approaches are considered: in the first, we use an entropy balance equation based on the master equation; in the second, we use a stochastic potential related to the probability distribution and built from the generalized Einstein relation. We show that both approaches give the same result for the entropy production of fluctuation (diS/dt)f. Next we consider a simple one-component nonequilibrium system under the perturbation of a macroscopically large external fluctuation as a power generator. We interpret (diS/dt)f in terms of net power gain factor under random external fluctuations in the spirit of a generalized "fluctuation-dissipation" theorem. It is shown that positive power gain is possible only for system staying far enough from equilibrium.

原文英語
頁(從 - 到)7011-7017
頁數7
期刊The Journal of Chemical Physics
84
發行號12
DOIs
出版狀態已發佈 - 1986
對外發佈

ASJC Scopus subject areas

  • 物理與天文學 (全部)
  • 物理與理論化學

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