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Order and information in the patterns of spinning magnetic micro-disks at the air-water interface

Wang, Wendong; Gardi, Gaurav; Malgaretti, Paolo; Kishore, Vimal; Koens, Lyndon; Son, Donghoon; Gilbert, Hunter; Wu, Zongyuan; Harwani, Palak; Lauga, Eric; Holm, Christian; Sitti, Metin

Authors

Wendong Wang

Gaurav Gardi

Paolo Malgaretti

Vimal Kishore

Donghoon Son

Hunter Gilbert

Zongyuan Wu

Palak Harwani

Eric Lauga

Christian Holm

Metin Sitti



Abstract

The application of the Shannon entropy to study the relationship between information and structures has yielded insights into molecular and material systems. However, the difficulty in directly observing and manipulating atoms and molecules hampers the ability of these systems to serve as model systems for further exploring the links between information and structures. Here, we use, as a model experimental system, hundreds of spinning magnetic micro-disks self-organizing at the air-water interface to generate various spatiotemporal patterns with varying degrees of order. Using the neighbor distance as the information-bearing variable, we demonstrate the links among information, structure, and interactions. We establish a direct link between information and structure without using explicit knowledge of interactions. Last, we show that the Shannon entropy by neighbor distances is a powerful observable in characterizing structural changes. Our findings are relevant for analyzing natural self-organizing systems and for designing collective robots.

Citation

Wang, W., Gardi, G., Malgaretti, P., Kishore, V., Koens, L., Son, D., …Sitti, M. (2022). Order and information in the patterns of spinning magnetic micro-disks at the air-water interface. Science Advances, 8(2), Article eabk0685. https://doi.org/10.1126/sciadv.abk0685

Journal Article Type Article
Acceptance Date Jan 14, 2022
Online Publication Date Jan 14, 2022
Publication Date 2022
Deposit Date Jan 25, 2022
Publicly Available Date Jan 28, 2022
Journal Science Advances
Electronic ISSN 2375-2548
Publisher American Association for the Advancement of Science
Peer Reviewed Peer Reviewed
Volume 8
Issue 2
Article Number eabk0685
DOI https://doi.org/10.1126/sciadv.abk0685
Public URL https://hull-repository.worktribe.com/output/3916656

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Copyright © 2022 The Authors, some rights reserved; exclusive licensee
American Association for the Advancement of Science





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