Weak dissipation does not result in the disappearance of the persistent current

作者：Gurtovoi V L^*; Ilin A I; Nikulov A V; Tulin V A

来源：Low Temperature Physics, 2010, 36(10-11): 974-981.

DOI：10.1063/1.3518606

Recent experiments confirm a prediction made by I.O. Kulik forty years ago to the effect that energy dissipation does not suppress the equilibrium circular current observed in the normal state of superconducting rings and normal metal rings. Conflicting interpretations of the persistent current as a Brownian motion or a dissipationless current are compared from the standpoint of observations of this phenomenon when an electric potential difference is present. Distinctions between quantum phenomena at the atomic and mesoscopic levels are emphasized. It is pointed out that quantum oscillations in the magnetic field of the potential difference observed in asymmetric rings with a persistent current can be verified experimentally under thermodynamic equilibrium.

• 出版日期2010-11