Dissipative dynamics of vortex lines in superfluid $^{4}$He

Дата и время публикации : 1996-09-14T01:35:31Z

Авторы публикации и институты :
H. M. Cataldo
M. A. Despósito
E. S. Hernández
D. M. Jezek

Ссылка на журнал-издание: Phys. Rev. B 55, 3792 (1997)
Коментарии к cтатье: 16 pages, no figures, to be published in PRB
Первичная категория: cond-mat

Все категории : cond-mat

Краткий обзор статьи: We propose a Hamiltonian model that describes the interaction between a vortex line in superfluid $^{4}$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.

Category: Physics