Physicists observe voids in light-sound waves moving faster than light without breaking relativity
Researchers have observed empty voids (singularities) in phonon-polariton waves moving faster than the speed of light within a thin flake of boron nitride, without violating the laws of relativity. Using ultrafast electron microscopy, they measured these voids in quasiparticles formed from photons coupled with atomic vibrations. The discovery has implications for fluid dynamics, optics, and other fields.
Key quotes
For the first time, researchers have detected empty voids moving faster than the speed of light — and they blazed past that cosmic speed limit without breaking the laws of relativity.
Researchers used recent advances in ultrafast electron microscopy to measure voids in phonon-polariton waves zooming around inside a thin flake of boron nitride.
Phonon-polaritons are quasiparticles formed from photons (quantized light) coupled with tiny vibrations, and they act like light and sound waves combined.
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