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A remark on truncation schemes of cumulant hierarchies |
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| Authors: | P. Hänggi P. Talkner |
| Affiliation: | (1) Institut für Theoretische Physik, Universität Stuttgart, West Germany;(2) Present address: Department of Chemistry, University of California, San Diego, La Jolla, California |
| Abstract: | We discuss some problems obtained by truncating a cumulant hierarchy at ordern > 2. We show that such a truncation scheme is not consistent witha in its whole range of definition nonnegative probability function. |
| Keywords: | Cumulant hierarchy nonlinear coupling Gaussian approximation characteristic function quasiprobability |
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