Solids passing thhrough each other without friction

Posted in Uncategorized by Mike Stay on 2005 March 27

[Article begins with discussion about superfluid helium and BECs.]

… What about solids? Can they “flow” without friction? Last year Moses Chan (Penn State) announced the results of an experiment in which solid helium-4 was revolved like a merry-go-round. It appeared that when the bulk was revolved at least part of the solid remained stationary. In effect part of the solid was passing through the rest of the solid without friction…


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