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Physics Colloquium:"Speak, Memory! What can a material memorize?"

SpeakerProfessor Sidney R. Nagel, University of Chicago
Date Oct 24, 2012
Time 4:00 pm  
Location 141 Loomis Lab
Sponsor Physics Department
Contact Marjorie Gamel
Phone 217-333-3762
Event type Seminar/Symposium
Views 5523
Originating Calendar Physics - Colloquium

Out-of-equilibrium disordered systems may preserve a memory of external driving that can be read out at a later time.  I will present one form of memory that does this 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 a continual repetition of the inputs.  However, if noise is added to the system, all the memories can be preserved indefinitely.  This provides a concrete example of 'plasticity' in memory formation.  Despite these surprising features, the cause of this memory formation is easily understood and appears to be generic.

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