PARIS, France — Scientists on Wednesday said that they have successfully stirred a strange matter called a "supersolid" — ...

“It is a bit like Schrödinger’s cat, which is both alive and dead, a supersolid is both rigid and liquid,” said Francesca Ferlaino from the University of Innsbruck. This seemingly ...

They found that this nearly two-dimensional crystal exhibits a small but measurable superfluid density, indicating the presence of a supersolid phase[2]. This finding is particularly intriguing as ...