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A quantum breakthrough makes light behave like both a solid and a liquid

Bizarre Quantum Matter at Room Temperature
A supersolid is an extraordinary state of matter that combines superfluidity with the spontaneous formation of a periodic, crystal-like structure. Credit: Marcin Muszyński, Faculty of Physics, University of Warsaw

Scientists have observed a bizarre quantum state of matter that combines the structure of a crystal with the frictionless flow of a liquid, all at room temperature. The breakthrough overturns a major practical limitation of exotic quantum experiments and could help bring powerful new light-based computing and sensing technologies closer to reality.

Scientists have demonstrated an extraordinary form of quantum matter that combines two properties that seem incompatible...

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