Orientation autocorrelation functions of a spherical Brownian particle
- 1 November 1976
- journal article
- research article
- Published by AIP Publishing in The Journal of Chemical Physics
- Vol. 65 (9) , 3616-3628
- https://doi.org/10.1063/1.433547
Abstract
The cumulant expansion method is used to compute quantities like 〈n(t) ⋅n(0) 〉, where n is a unit vector fixed on a Brownian particle immersed in a classical fluid, with an angular velocity obeying a generalized Langevin equation. The results are valid both in the limits of a free and of a completely hindered rotation. In the long time limit corrections to the Debye equation of diffusion on the unit sphere are found.Keywords
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