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Scientists discover hidden symmetries, opening new avenues for material design
Source: phys.org / University of Chicago
Date: 4 February, 2020
Scientists used a LEGO array to demonstrate how sound waves can propagate identically in different structures.
When you knock on a melon to see if it's ripe, you are using sound waves to probe the structure of the material inside. Physicists at the University of Chicago were using the same concept to explore how sound waves travel through patterned structures when they noticed an oddity: completely different structures sounded the same.
This was a surprising thing—sort of like knocking on a melon and a pineapple, and discovering they both made the same sound.
"What got us excited was that we could not explain our findings using existing concepts, such as spatial symmetries," said Vincenzo Vitelli, a professor of physics in the James Franck Institute.
What Vitelli and his group had discovered was a duality, a "hidden" symmetry linking apparently unrelated systems. Published in Nature, their study could one day help to design metamaterials or even microscopic devices that process information encoded in sound waves.
https://phys-org.cdn.ampproject.org...tists-hidden-symmetries-avenues-material.html
Source: phys.org / University of Chicago
Date: 4 February, 2020
Scientists used a LEGO array to demonstrate how sound waves can propagate identically in different structures.
When you knock on a melon to see if it's ripe, you are using sound waves to probe the structure of the material inside. Physicists at the University of Chicago were using the same concept to explore how sound waves travel through patterned structures when they noticed an oddity: completely different structures sounded the same.
This was a surprising thing—sort of like knocking on a melon and a pineapple, and discovering they both made the same sound.
"What got us excited was that we could not explain our findings using existing concepts, such as spatial symmetries," said Vincenzo Vitelli, a professor of physics in the James Franck Institute.
What Vitelli and his group had discovered was a duality, a "hidden" symmetry linking apparently unrelated systems. Published in Nature, their study could one day help to design metamaterials or even microscopic devices that process information encoded in sound waves.
https://phys-org.cdn.ampproject.org...tists-hidden-symmetries-avenues-material.html