A Solid Like No Other: Frigid, solid helium streams like a liquid

By Peter Weiss, 15:50 PM April 15, 2008

Captured within the cavities of a porous glass disk, frozen helium has coalesced into a long-awaited, but never-before-observed, quantum phase of matter, a team of physicists claims. In that extraordinary state, known as a superfluid solid or supersolid, the material is expected to flow like a liquid yet maintain its solid crystal structure, says team leader Moses H.W. Chan of Pennsylvania State University in State College.

Frictionless flow, also known as superfluidity, has previously been o...

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