Low Temperature Physics: 36, 974 (2010); https://doi.org/10.1063/1.3518606 (8 pages)
Физика Низких Температур: Том 36, Выпуск 10-11 (Октябрь 2010), c. 1209-1218    ( к оглавлению , назад )

Weak dissipation does not result in disappearance of persistent current

V.L. Gurtovoi, A.I. Ilin, A.V. Nikulov, and V.A. Tulin

Institute of Microelectronics Technology, Russian Academy of Sciences Chernogolovka, Moscow District 142432, Russia
E-mail: nikulov@iptm.ru

Received April 1, 2010


Experimental results obtained last years corroborate a prediction made by I.O. Kulik forty years ago that the energy dissipation does not result in disappearance of equilibrium circular current observable in the normal state of superconductor rings and normal metal rings. Contrary interpretations of the persistent current as a Brownian motion or a dissipationless current are compared in the point of view of the observations of this phenomenon at presence of an electric potential difference. Distinctions between the quantum phenomena at atomic and mesoscopic levels are accentuated. In connection of the quantum oscillations in magnetic field of potential difference observed on asymmetric rings with the persistent current, it is pointed out that an experimental check of such phenomenon at thermodynamic equilibrium is possible.

PACS: 73.23.Ra Persistent currents;
PACS: 74.78.Na Mesoscopic and nanoscale systems.

Key words: mesoscopic quantum phenomena, a persistent current.