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Title: Anomalous cross-field diffusion in a magnetic trap
Authors: Savel'ev, Sergey
Marchesoni, Fabio
Issue Date: 2014
Publisher: © American Physical Society
Citation: SAVEL'EV, S. and MARCHESONI, F., 2014. Anomalous cross-field diffusion in a magnetic trap. Physical Review E - Statistical, Nonlinear, and Soft Matter Physics, 90 (6), 062117.
Abstract: We numerically simulated the diffusion of a charged Brownian particle confined to a plane under the action of an orthogonal magnetic field with intensity depending on the distance from a center. Despite its apparent simplicity, this system exhibits anomalous diffusion. For positive field gradients, radial and angular dynamics are asymptotically subdiffusive, with exponents given by simple analytical expressions. In contrast, when driven by a weakly decaying field, the particle attains normal diffusion only after exceedingly long superdiffusive transients. These mechanisms can be related to Bohm diffusion in magnetized plasmas.
Description: This article was published in the journal, Physical Review E [© The American Physical Society].
Sponsor: S.E.S. acknowledges support from the Leverhulme Trust; F.M. acknowledges support from the European Commission, under the Seventh Framework Programme (256959, NanoPower).
Version: Published
DOI: 10.1103/PhysRevE.90.062117
URI: https://dspace.lboro.ac.uk/2134/18512
Publisher Link: http://dx.doi.org/10.1103/PhysRevE.90.062117
ISSN: 1539-3755
Appears in Collections:Published Articles (Physics)

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