Mesoscopic oscillator in U-shape with giant persistent current

TL;DR

This paper proposes a U-shaped mesoscopic oscillator that uses magnetic flux and confinement potential to generate a giant, tunable persistent current through controlled initial localization and sudden parameter changes.

Contribution

It introduces a novel mesoscopic U-shaped oscillator mechanism that produces a significantly enhanced and tunable persistent current compared to traditional Aharonov-Bohm oscillations.

Findings

The oscillator can generate currents over two orders of magnitude larger than standard Aharonov-Bohm oscillations.

The period of oscillation is adjustable through system parameters.

Numerical simulations support the theoretical predictions.

Abstract

A mesoscopic oscillator in U-shape has been proposed and studied. Making use of a magnetic flux together with a potential of confinement, the electron contained in the oscillator has been localized initially and an amount of energy has been thereby stored. Then a sudden cancellation of both the potential and the flux may cause an initial current which initiates a periodic motion of the electron from one end of the U-oscillator to the opposite end, and repeatedly. The period is adjustable. The current associated with the periodic motion can be tuned very strong (say, more than two orders larger than the current of the usual Aharonov-Bohm oscillation). Related theory and numerical results are presented.