Controllable quantum scars in semiconductor quantum dots

TL;DR

This paper demonstrates how magnetic fields and localized potentials can precisely control quantum scars in semiconductor quantum dots, potentially enabling manipulation of electric currents in nanostructures.

Contribution

It introduces a method to control the geometry and orientation of quantum scars using magnetic fields and focused perturbations in 2D quantum dots.

Findings

Quantum scars can be manipulated with magnetic fields.

The orientation of scars is controllable with localized potentials.

Potential applications in nanostructure current control.

Abstract

Quantum scars are enhancements of quantum probability density along classical periodic orbits. We study the recently discovered phenomenon of strong, perturbation-induced quantum scarring in the two-dimensional harmonic oscillator exposed to a homogeneous magnetic field. We demonstrate that both the geometry and the orientation of the scars are fully controllable with a magnetic field and a focused perturbative potential, respectively. These properties may open a path into an experimental scheme to manipulate electric currents in nanostructures fabricated in a two-dimensional electron gas.