Mutual friction in superfluid [sup 3]He. II. Continuous vortices in [sup 3]He-[ital A] at low temperatures

Journal Article · Tue Jun 01 04:00:00 EDT 1993 · Physical Review, B: Condensed Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.47.14354· OSTI ID:6496002

Kopnin, N B ^[1]

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1. Low Temperature Laboratory, Helsinki University of Technology, Otakaari 3 A, 02150 Espoo (Finland)

The mutual-friction parameters for axisymmetric continuous vortices in the [ital A] phase at low temperatures are calculated on the basis of microscopic BCS theory for nonstationary processes. The parameters depend on the ratio of the distance between the energy levels of quasiparticles localized in the vortex, [omega][sub 0], and the relaxation rate of these quasiparticles, 1/[tau]. The transition from viscous to dissipationless flow of vortices occurs when [omega][sub 0][tau][similar to]1, the corresponding temperatures being well below [ital T][sub [ital c]]. From the viscosity coefficient, we estimate the effective cross section of the continuous vortex and its mass. We show that, with the continuous vortex, one can associate a normal region with a radius of order [ital R]([ital T]/[ital T][sub [ital c]]), [ital R] being the size of the vortex. The effect of mutual friction on the vortex eigenmodes is discussed.

• OSTI ID: 6496002
• Journal Information: Physical Review, B: Condensed Matter; (United States), Journal Name: Physical Review, B: Condensed Matter; (United States) Vol. 47:21; ISSN 0163-1829; ISSN PRBMDO
• Country of Publication: United States
• Language: English

Related Subjects

665520* -- Other Methods of Direct Energy Conversion-- (1992-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
BCS THEORY
EVEN-ODD NUCLEI
FLUID FLOW
FLUIDS
FRICTION
HELIUM 3
HELIUM 3 A
HELIUM ISOTOPES
INTERNAL FRICTION
ISOTOPES
LIGHT NUCLEI
NUCLEI
QUANTUM FLUIDS
STABLE ISOTOPES
SUPERFLUIDITY
TEMPERATURE DEPENDENCE
TEMPERATURE RANGE
TEMPERATURE RANGE 0000-0013 K
VISCOSITY
VORTEX FLOW