Motions in a bose condensate: VI. Vortices in a nonlocal model

Natalia G. Berloff, Paul H. Roberts

Результат исследований: Вклад в журналСтатьярецензирование

37 Цитирования (Scopus)


Nonlocal nonlinear Schrödinger equations are considered as models of liquid helium II. The models contain a nonlocal interaction potential that leads to a phonon-roton-like dispersion relation. Also, a higher-order term in the local density approximation for the correlation energy is introduced into the model to overcome nonphysical mass concentrations. These equations are solved for straight-line vortices. It is demonstrated that the parameters of the equation can be chosen to bring into agreement the vortex core parameter and the healing length. The structure of vortex rings of large radius is studied. The family of the vortex rings of different radii propagating with different velocities is found numerically. As the velocity of the vortex ring reaches the Landau critical velocity the sequence of rings terminates.

Язык оригиналаАнглийский
Страницы (с-по)5611-5625
Число страниц15
ЖурналJournal of Physics A: Mathematical and General
Номер выпуска30
СостояниеОпубликовано - 30 июл. 1999
Опубликовано для внешнего пользованияДа


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