Perturbations of Noise: The origins of Isothermal Flows

Details Perturbations of Noise: The origins of Isothermal Flows Perturbations of Noise: The origins of Isothermal Flows

1998-09-22

arxiv.org/abs/cond-mat/9809288v1

Phys. Rev. E 59, (1999), 1498--1511

Physics

Condensed Matter

Latex file

Scientific paper

10.1103/PhysRevE.59.1498

We make a detailed analysis of both phenomenological and analytic background for the "Brownian recoil principle" hypothesis (Phys. Rev. A 46, (1992), 4634). A corresponding theory of the isothermal Brownian motion of particle ensembles (Smoluchowski diffusion process approximation), gives account of the environmental recoil effects due to locally induced tiny heat flows. By means of local expectation values we elevate the individually negligible phenomena to a non-negligible (accumulated) recoil effect on the ensemble average. The main technical input is a consequent exploitation of the Hamilton-Jacobi equation as a natural substitute for the local momentum conservation law. Together with the continuity equation (alternatively, Fokker-Planck), it forms a closed system of partial differential equations which uniquely determines an associated Markovian diffusion process. The third Newton law in the mean is utilised to generate diffusion-type processes which are either anomalous (enhanced), or generically non-dispersive.

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