Sound-Levitated Time Crystal Demonstrates Nonreciprocal Interactions
NYU physicists have observed a visible, classical time crystal formed by millimeter beads levitated in a standing sound wave. The beads exchange sound waves in a nonreciprocal way, causing them to oscillate in a steady rhythm while hovering, a behavior that violates Newton's Third Law. The device stands about a foot tall and the work, published in Physical Review Letters, hints at links to biological timing systems and could influence future tech in quantum computing and data storage, though practical uses are still years away.
