Abstract
General connections between the velocity autocorrelation function and the mean-square-displacement for a special initial condition are established and shown to reduce in the high-temperature limit to earlier such results obtained by Scher and Lax. A simple and useful relation, which is valid in the high temperature limit, between the velocity autocorrelation function and memory functions in generalized master equations is given.
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Kenkre, V.M., Kühne, R. & Reineker, P. Connection of the velocity autocorrelation function to the mean-square-displacement and to the memory function of generalized master equations. Z. Physik B - Condensed Matter 41, 177–180 (1981). https://doi.org/10.1007/BF01293416
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DOI: https://doi.org/10.1007/BF01293416