Andreev reflection in rotating superfluid {sup 3}He-B

Journal Article · Mon Dec 15 04:00:00 EST 2014 · Journal of Experimental and Theoretical Physics

DOI:https://doi.org/10.1134/S1063776114120115· OSTI ID:22472479

Eltsov, V. B.; Hosio, J. J.; Mäkinen, J. T. ^[1]

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1. Aalto University, O. V. Lounasmaa Laboratory, School of Science (Finland)

Andreev reflection of quasiparticle excitations from quantized line vortices is reviewed in the isotropic B phase of superfluid {sup 3}He in the temperature regime of ballistic quasiparticle transport at T ≤ 0.20T{sub c}. The reflection from an array of rectilinear vortices in solid-body rotation is measured with a quasiparticle beam illuminating the array mainly in the orientation along the rotation axis. The result is in agreement with the calculated Andreev reflection. The Andreev signal is also used to analyze the spin-down of the superfluid component after a sudden impulsive stop of rotation from an equilibrium vortex state. In a measuring setup where the rotating cylinder has a rough bottom surface, annihilation of the vortices proceeds via a leading rapid turbulent burst followed by a trailing slow laminar decay, from which the mutual friction dissipation can be determined. In contrast to the currently accepted theory, it is found to have a finite value in the zero-temperature limit: α(T→0) = (5 ± 0.5) × 10{sup −4}.

• OSTI ID: 22472479
• Journal Information: Journal of Experimental and Theoretical Physics, Journal Name: Journal of Experimental and Theoretical Physics Journal Issue: 6 Vol. 119; ISSN JTPHES; ISSN 1063-7761
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ANNIHILATION
CYLINDERS
EXCITATION
FRICTION
HELIUM 3
REFLECTION
ROTATION
SOLIDS
SPIN
SUPERFLUIDITY
SURFACES
TEMPERATURE ZERO K
VORTICES