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Superfluid prediction kicks up a storm


Boundary layers are conventionally associated with viscosity, and were not expected to arise in superfluids.  Modelling superfluid helium flowing over a surface with nano-scale roughness, typical of real surfaces, has shown the formation of a quantum boundary layer, consisting of a tightly knitted layer of quantum vortices.  These findings are published in Physical Review Letters and featured in Physics.  You can also see a short clip of the results here.