BEGIN:VCALENDAR VERSION:2.0 PRODID:Data::ICal 0.22 BEGIN:VEVENT DESCRIPTION:Prof. Mikhail Katsnelson \, Radboud University of Nijmegen\, Th e Netherlands\, \n\n
The origin of complexity remains one of the most i mportant and\, at the same time\, the most controversial scientific proble ms. Earlier attempts were based on theory of dynamical systems but did not lead to a satisfactory solution of the problem. I believe that a deeper u nderstanding is possible based on a recent development of statistical phys ics\, combining it with relevant ideas from evolutionary biology and machi ne learning.
\n\nUsing patterns in magnetic m aterials as the main example\, I discuss some general problems such as (a) a formal definition of pattern complexity [1]\; (b) self-induced spin gla ssiness due to competing interactions as a way to interpret chaotic patter ns [2]\; (c) multi-well states intermediate between glasses and ordinary o rdered states and their relevance for the problem of long-term memory in c omplicated systems [3]\; and (d) complexity of frustrated quantum spin sys tems [4]. I will also review a very recent experimental observation of sel f-induced spin-glass state in elemental neodymium [5].
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