Tag

Acoustic Levitation

All articles tagged with #acoustic levitation

science18 days ago•11 min saved

Sound-Wave Time Crystal Goes Visible, Challenges Newton’s Third Law

NYU physicists built a time crystal from a standing sound-wave field that levitates styrofoam beads and causes nonreciprocal interactions, effectively not following Newton’s third law. The one-foot-tall device is visible to the naked eye and uses acoustic levitation to propel bead motion, offering potential advances for quantum computing and understanding nonreciprocal processes in biology; the work was published in Physical Review Letters.

via Interesting Engineering|

#acoustic-levitation #newtons-third-law #nonreciprocal

science18 days ago•6 min saved

Sound-levitated time crystal ticks by breaking symmetry

NYU physicists levitated tiny beads with sound to create a visible, classical time crystal whose nonreciprocal, uneven interactions between particles break Newton’s third law and drive self-sustained oscillations in a compact device; the simple setup could inform future quantum technologies and offer insights into biological timing systems, with the work published in Physical Review Letters.

via ScienceDaily|

#acoustic-levitation #newtons-third-law #nonreciprocal-interactions

science21 days ago•13 min saved

One-Molecule Carbon Layer Dictates Charging of Identical Particles

Scientists used acoustic levitation to study charge transfer between identical silica grains and found that a microscopic adventitious carbon layer on surfaces governs the charging behavior. Removing this carbon eliminates charging; allowing the layer to reform restores and even flips the charge. This resolves the symmetry problem for identical materials and has implications for natural phenomena like dust storms and volcanic lightning, as well as for theories of planetary formation and the origin of life. The findings were published in Nature.

via ZME Science|

#acoustic-levitation #adventitious-carbon #planetary-formation

science1 month ago•7 min saved

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.

via SciTechDaily|

#acoustic-levitation #newtons-third-law #nonreciprocal-interactions

science2 months ago•5 min saved

Two Beads, One Standing Wave: A Lab-Scale Time Crystal

NYU researchers demonstrate a classical time crystal using an acoustic standing-wave field to levitate and couple tiny polystyrene beads; through non-reciprocal scattering of sound, the beads self-sustain a temporal oscillation without external driving, making it the simplest possible time-crystal system and offering a macroscopic platform to study non-reciprocity. The findings are reported in Physical Review Letters.

via ScienceAlert|

#acoustic-levitation #non-reciprocal-interaction #physical-review-letters