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- W2049331061 abstract "Abstract We consider thermal fluctuations in a system with many degrees of freedom described by macroscopic equations and discuss the question how by elimination of variables one can arrive at a contracted stochastic equation for a subsystem. It is shown that for the validity of the fluctuation-dissipation theorem in the contracted description it is necessary to formulate the linear macroscopic equations in such a way that the equal-time thermal fluctuations of the subsystem are statistically independent of the variables which are eliminated. If this is not the case then a preliminary transformation of variables is required. As special cases we discuss the derivation of the Langevin equation for a Brownian particle immersed in a fluid and for a particle embedded in a harmonic lattice." @default.
- W2049331061 created "2016-06-24" @default.
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- W2049331061 date "1980-06-01" @default.
- W2049331061 modified "2023-09-28" @default.
- W2049331061 title "Contracted description of fluctuating systems" @default.
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- W2049331061 doi "https://doi.org/10.1016/0378-4371(80)90068-0" @default.
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