@article{Harr2012-11-21Force-25432,
  year={2012},
  doi={10.1088/0953-8984/24/46/464105},
  title={Force-induced diffusion in microrheology},
  number={46},
  volume={24},
  issn={0953-8984},
  journal={Journal of Physics: Condensed Matter},
  author={Harr, Christian and Winter, D. and Horbach, Jürgen and Fuchs, Matthias and Voigtmann, Thomas},
  note={Article Number: 464105}
}

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    <dcterms:abstract xml:lang="eng">We investigate the force-induced diffusive motion of a tracer particle inside a glass-forming suspension when a strong external force is applied to the probe (active nonlinear microrheology). A schematic model of mode-coupling theory introduced recently is extended to describe the transient dynamics of the probe particle, and used to analyze recent molecular-dynamics simulation data. The model describes non-trivial transient displacements of the probe before a steady-state velocity is reached. The external force also induces diffusive motion in the direction perpendicular to its axis. We address the relation between the transverse diffusion coefficient D⊥ and the force-dependent nonlinear friction coefficient ζ. Non-diffusive fluctuations in the direction of the force are seen at long times in the MD simulation, while the model describes cross-over to long-time diffusion.</dcterms:abstract>
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    <dcterms:issued>2012-11-21</dcterms:issued>
    <dcterms:bibliographicCitation>Journal of Physics: Condensed Matter ; 24 (2012), 46. - 464105</dcterms:bibliographicCitation>
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