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Direct verification of the relation υs = (hslash/m) bigtriangledown phi

Yuki Sato, Aditya Joshi and Richard Packard

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We describe an experiment in which we induce a heat-driven superfluid flow in a straight tube and monitor the phase difference across the tube's ends with a superfluid 4He quantum interference device (SHeQUID). We quantitatively verify the relation υs = (hslash/m) ∇ phi . We also demonstrate the linearization of a SHeQUID using the heat injection method.


PACS

67.25.dm Two-fluid model; phenomenology

67.25.dk Vortices and turbulence

67.25.de Thermodynamic properties

Subjects

Quantum gases, liquids and solids

Dates

Issue 3 (2009)



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