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Generic Transient Memory Formation in Disordered Systems with Noise

Nathan C. Keim and Sidney R. Nagel
Phys. Rev. Lett. 107, 010603 – Published 30 June 2011
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Abstract

Out-of-equilibrium disordered systems may form memories of external driving in a remarkable fashion. The system “remembers” multiple values from a series of training inputs yet “forgets” nearly all of them at long times despite the inputs being continually repeated. Here, learning and forgetting are inseparable aspects of a single process. The memory loss may be prevented by the addition of noise. We identify a class of systems with this behavior, giving as an example a model of non-Brownian suspensions under cyclic shear.

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  • Received 14 January 2011

DOI:https://doi.org/10.1103/PhysRevLett.107.010603

© 2011 American Physical Society

Synopsis

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The importance of being noisy

Published 30 June 2011

Noise has a distinct effect on how some mechanical systems learn and forget.

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Authors & Affiliations

Nathan C. Keim* and Sidney R. Nagel

  • James Franck Institute and Department of Physics, University of Chicago, 929 E. 57th Street, Chicago, Illinois 60637, USA

  • *Present address: Department of Mechanical Engineering and Applied Mechanics, University of Pennsylvania, 220 S. 33rd Street, Philadelphia, PA 19104, USA.
  • srnagel@uchicago.edu

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Issue

Vol. 107, Iss. 1 — 1 July 2011

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