Velocity Autocorrelations for Hard Spheres

B. J. Alder and T. E. Wainwright
Phys. Rev. Lett. 18, 988 – Published 5 June 1967
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Abstract

A study of the velocity autocorrelation function for hard spheres over the entire fluid density region shows that deviations from exponential behavior are small. At very low density a small positive deviation is found which is accounted for in the Boltzmann theory of the self-diffusion coefficient. At higher densities the principal non-Markovian process is identified with a surprisingly long persistence of velocity currents. At still higher densities, near solidification, anticorrelating backscattering events predominate.

  • Received 1 May 1967

DOI:https://doi.org/10.1103/PhysRevLett.18.988

©1967 American Physical Society

Authors & Affiliations

B. J. Alder and T. E. Wainwright

  • Lawrence Radiation Laboratory, University of California, Livermore, California

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Issue

Vol. 18, Iss. 23 — 5 June 1967

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