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Hasnain says:

“One involves the nature of the liquid surroundings. The atomic spectrum abruptly tightened when the group chilled the helium into a superfluid state, a quantum mechanical phenomenon where individual atoms lose their identity in a way that permits them to flow together without rubbing against one another. Superfluidity takes the edge off atomic collisions in general, so researchers expect foreign atoms to experience only mild broadening or even a limited amount of tightening in some cases. “Superfluid helium,” Lemeshko said, “is the softest known thing you can immerse atoms and molecules into.””

Posted on 2022-03-20T04:53:04+0000