Images and nonlocal vortex pinning in thin superfluid films

Дата и время публикации : 1998-02-20T09:15:13Z

Авторы публикации и институты :
H. H. Lee
J. M. F. Gunn

Ссылка на журнал-издание: Ссылка на журнал-издание не найдена
Коментарии к cтатье: 19 pages, revtex, to appear Phys. Rev. B
Первичная категория: cond-mat.stat-mech

Все категории : cond-mat.stat-mech

Краткий обзор статьи: For thin films of superfluid adsorbed on a disordered substrate, we derive the equation of motion for a vortex in the presence of a random potential within a mean field (Hartree) description of the condensate. The compressible nature of the condensate leads to an effective pinning potential experienced by the vortex which is nonlocal, with a long range tail that smoothes out the random potential coupling the condensate to the substrate. We interpret this nonlocality in terms of images, and relate the effective potential governing the dynamics to the pinning energy arising from the expectation value of the Hamiltonian with respect to the vortex wavefunction.

Category: Physics