Multiple memory formation in glassy landscapes

Abstract

Cyclically sheared jammed packings form memories of the shear amplitude at which they were trained by falling into periodic orbits where each particle returns to the identical position in subsequent cycles. While simple models that treat clusters of rearranging particles as isolated two-state systems offer insight into this memory formation, they fail to account for the long training times and multi-period orbits observed in simulated sheared packings. We show that adding interactions between rearranging clusters overcomes these deficiencies. In addition, interactions allow simultaneous encoding of multiple memories which would not have been possible otherwise. These memories are different in an essential way from those found in other systems, such as multiple transient memories observed in sheared suspensions, and contain information about the strength of the interactions.

arXiv comment7 pages, 6 figures

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Cited by in corpus (10)

• Complex pathways and memory in compressed corrugated sheets
• Memory from coupled instabilities in unfolded crumpled sheets
• Emergent Disorder and Mechanical Memory in Periodic Metamaterials
• Sequential Snapping and Pathways in a Mechanical Metamaterial
• Mechanical annealing and memories in a disordered solid
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• Memory in Non-Monotonic Stress Response of an Athermal Disordered Solid
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• Profusion of Transition Pathways for Interacting Hysterons