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science4h ago
New time crystal built using sound waves breaks Newton’s third law
- Researchers at NYU built a time crystal using sound waves, causing nonreciprocal motion that challenges Newton’s third law.
- The beads are levitated by a standing sound field and interact by scattering sound waves among themselves.
- The device measures about a foot tall and is visible without magnification, a novelty in time-crystal experiments.
- Researchers see potential applications in understanding circadian rhythms and nonreciprocal processes in biology and chemistry.
- The work was published in Physical Review Letters, adding a peer-reviewed basis to these findings.
- Lead researcher David Grier notes the system is remarkably simple for studying time-crystal phenomena.
- The experiment uses tiny styrofoam beads floating on a cushion of sound, forming the core time-crystal setup.
- The time crystal allows study of nonreciprocal interactions, which differ from traditional symmetric force interactions.
- The NYU team’s findings may inform future technologies that exploit asymmetrical force dynamics.
- The research was announced with a press release and reports in Physical Review Letters, marking peer-reviewed validation.
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