Roton-vortex interactions in superfluid helium

Journal Article · Mon Aug 19 04:00:00 EDT 1991 · Physical Review Letters; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.67.1003· OSTI ID:5255290

Ferrell, R A; Kyung, B ^[1]

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1. Center for Superconductivity Research of the Department of Physics, University of Maryland, College Park, Maryland (USA)

From a new mathematical identity and by using the fractional difference between the momentum of a roton and the momentum at the bottom of the roton minimum as a small expansion parameter, a first-order perturbation treatment of the roton-vortex interaction is developed. The resulting analytic expressions for the distribution of transverse momentum transfer, in terms of elliptic integrals, are shown to be in excellent agreement with recent computer-simulation results of Samuels and Donnelly and are convenient for computing the total momentum transfer.

• OSTI ID: 5255290
• Journal Information: Physical Review Letters; (United States), Journal Name: Physical Review Letters; (United States) Vol. 67:8; ISSN PRLTA; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

640450* -- Fluid Physics-- Superfluidity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ANALYTICAL SOLUTION
COMPARATIVE EVALUATIONS
EVALUATION
EVEN-EVEN NUCLEI
FLUIDS
HELIUM 4
HELIUM II
HELIUM ISOTOPES
ISOTOPES
LIGHT NUCLEI
LINEAR MOMENTUM
MOMENTUM TRANSFER
NUCLEI
PERTURBATION THEORY
QUANTUM FLUIDS
QUASI PARTICLES
ROTONS
STABLE ISOTOPES
TRANSVERSE MOMENTUM
VORTICES