Dissipative dynamics of vortex lines in superfluid {sup 4}He

Journal Article · Sat Feb 01 04:00:00 EST 1997 · Physical Review, B: Condensed Matter

DOI:https://doi.org/10.1103/PhysRevB.55.3792· OSTI ID:450391

Cataldo, H M; Desposito, M A; Hernandez, E S; Jezek, D M ^[1]

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1. Departamento de Fisica, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, RA-1428 Buenos Aires (Argentina)

We propose a Hamiltonian model that describes the interaction between a vortex line in superfluid {sup 4}He and the gas of elementary excitations. An equation of irreversible motion for the density operator of the vortex, regarded as a macroscopic quantum particle with a finite mass, is derived in the frame of generalized master equations. This enables us to cast the effect of the coupling as a drag force with one reactive and one dissipative component, in agreement with the assumption of the phenomenological theories of vortex mutual friction in the two fluid model. {copyright} {ital 1996} {ital The American Physical Society}

• OSTI ID: 450391
• Journal Information: Physical Review, B: Condensed Matter, Journal Name: Physical Review, B: Condensed Matter Journal Issue: 6 Vol. 55; ISSN 0163-1829; ISSN PRBMDO
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
BROWNIAN MOVEMENT
COLLECTIVE EXCITATIONS
DRAG
EQUATIONS OF MOTION
HELIUM 4
SUPERFLUIDITY
VORTICES