What is it about?
The behavior of materials can change dramatically when moving from the interior to an edge or boundary, for example in the case of "topological insulators." This article is a companion to a research article that extends these ideas to a class of fluid waves near the acoustic cut-off frequency.
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Why is it important?
Some of the properties of topological insulators require advanced engineering fabrication. The analogy made here to a class of fluid waves promises to open up this field of research to table-top fluid experiments that are easier to construct.
Perspectives
Many universities have dropped complex analysis from their undergraduate STEM course offerings, but this trend should be reversed, in part because of physical phenomena like that described in this article.
Professor Timothy E. Dowling
University of Louisville
Read the Original
This page is a summary of: Berry’s lesson for Lamb, Nature Nanotechnology, June 2019, Springer Science + Business Media,
DOI: 10.1038/s41567-019-0575-8.
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