Upcoming Events

Material Memories

June 14, 2012 11:00AM to 12:00PM
Sidney Nagel, The University of Chicago
Building 212, Room A157
Materials Science Colloquium
Systems render information about their formation inaccessible to observers after they relax to equilibrium; a system that has not fully relaxed has the potential to retain memories of its creation. I will describe a class of out-of-equilibrium disordered systems that form memories in a remarkable fashion. The system "‘remembers" multiple values from a series of training inputs yet "forgets" nearly all of them at long times even though the inputs are continually repeated. However, with the addition of noise, the system retains all the memories indefinitely. I will argue that this is a generic process that may be seen in a variety of situations.