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A heavy ion in a fluid in presence of an electromagnetic field seen as an ordinary Brownian motion

Author

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  • Jiménez-Aquino, J.I.
  • Romero-Bastida, M.

Abstract

An alternative method of how to characterize, at equilibrium, the diffusion process of a Brownian charged particle (heavy ion) in a fluid in presence of an electromagnetic field is presented. The theory is formulated via a Langevin equation associated with the ion's velocity vector, which is transformed to another velocity-space in which the diffusion process is quite similar to that of the ordinary Brownian motion. The diffusion process is characterized, in absence and in presence of the electric field, through the mean square displacement in the transformed configuration-space and then returned to the original variables, by means of the corresponding transformation. Under the action of the electric field, the diffusion process is studied for a general time-dependent electric field. Explicit results are obtained for a constant and oscillating electric field.

Suggested Citation

  • Jiménez-Aquino, J.I. & Romero-Bastida, M., 2007. "A heavy ion in a fluid in presence of an electromagnetic field seen as an ordinary Brownian motion," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 386(1), pages 63-72.
    • Handle: RePEc:eee:phsmap:v:386:y:2007:i:1:p:63-72
    DOI: 10.1016/j.physa.2007.08.008
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