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How does self-organization reduce entropy?
12 November 2021 @ 16:00 - 17:00
ÖMER İLDAY
MSN Graduate Program and UNAM
Self-organization is the spontaneous emergence of an ordered state. Despite its ubiquity, how self-organization reduces entropy was never clarified. In this talk, we present a new theoretical framework, whereby we decompose a self-organized system into two parts, one that gets ordered and another that reduces the entropy of the former by mutual information generated through a feedback process. We show that the combined system simply evolves to higher total entropy, which inadvertently reduces the entropy of the organized part.
Self-organization is notoriously difficult to direct to a specific pattern. Our new framework suggests a route. We need to ensure that the desired pattern has higher feedback gain than the competing ones. We also introduce stimulated symmetry breaking as means to reshape the feedback gain landscape. As a proof of concept, we experimentally demonstrate directing a self-organization process, namely, nonlinear laser lithography, to create all 2D Bravais lattices.
About The Speaker
Dr. F. Ömer Ilday studied theoretical physics at Boğaziçi University, Istanbul, Turkey, graduating valedictorian in 1998. He took his Ph.D. in applied physics from Cornell University, USA, in 2003. He worked at MIT from 2003 to 2006. In 2006, he joined Bilkent University as a faculty member. He was awarded the European Research Council’s prestigious Consolidator Grant in 2013, the first ERC grant on basic science in Turkey, and the ERC Proof of Concept Grant in 2021. He has published ten articles in Nature, Nature Photonics, Nature Physics, and Nature Communications. His contributions to science have been generously recognized through the Findlay Award, TÜBA-GEBIP Award, Teşvik Award (TÜBİTAK), Engin Arık Science Award from the Turkish Physical Society, and the top award in science in Turkey, the Science Award of TÜBİTAK. He has been elected as a member of the Science Academy of Turkey and Academia Europaea.
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