Order and information in the patterns of spinning magnetic micro-disks at the air-water interface.
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Authors
Harwani, Palak
Publication Date
2022-01-14Journal Title
Sci Adv
ISSN
2375-2548
Publisher
American Association for the Advancement of Science (AAAS)
Volume
8
Issue
2
Language
eng
Type
Article
This Version
VoR
Metadata
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Wang, W., Gardi, G., Malgaretti, P., Kishore, V., Koens, L., Son, D., Gilbert, H., et al. (2022). Order and information in the patterns of spinning magnetic micro-disks at the air-water interface.. Sci Adv, 8 (2) https://doi.org/10.1126/sciadv.abk0685
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.
Identifiers
PMC8759740, 35030013
External DOI: https://doi.org/10.1126/sciadv.abk0685
This record's URL: https://www.repository.cam.ac.uk/handle/1810/334039
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