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Add to Calendar 4/2/2019 10:00 am 4/2/2019 America/Chicago Special Institute for Condensed Matter Theory Seminar: AQS-automata, state transition graphs, return-point memory and random maps DESCRIPTION:

AQS-automata arise naturally in the description of the athermal dynamics of a disordered system -- such as spin glasses -- when a slowly changing uniform driving force is applied. The response of such systems is characterized by abrupt transitions between quasi-static configurations which are generally irreversible, giving thus rise to hysteresis. The dynamical response of such systems can be described in terms of a pair of random, directed and acyclic graphs, capturing the irreversible transitions triggered by force increases and decreases, respectively. Properties such as return-point memory emerge then as features of these graphs. In this talk I will develop the graph-theoretic description of AQS-automata and then present recent work with T. Witten on modeling the AQS dynamics by random maps.


\n\nSPEAKER: Muhittin Mungan, University of Bonn
3110 ESB, 1101 W. Springfield, Urbana false

Special Institute for Condensed Matter Theory Seminar: AQS-automata, state transition graphs, return-point memory and random maps

Speaker Muhittin Mungan, University of Bonn
Date: 4/2/2019
Time: 10 a.m.
Location: 3110 ESB, 1101 W. Springfield, Urbana
Sponsor: Institute for Condensed Matter Theory
Event Type: Seminar/Symposium
 

AQS-automata arise naturally in the description of the athermal dynamics of a disordered system -- such as spin glasses -- when a slowly changing uniform driving force is applied. The response of such systems is characterized by abrupt transitions between quasi-static configurations which are generally irreversible, giving thus rise to hysteresis. The dynamical response of such systems can be described in terms of a pair of random, directed and acyclic graphs, capturing the irreversible transitions triggered by force increases and decreases, respectively. Properties such as return-point memory emerge then as features of these graphs. In this talk I will develop the graph-theoretic description of AQS-automata and then present recent work with T. Witten on modeling the AQS dynamics by random maps.


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