Magnetoresistance in an electronic cavity coupled to one-dimensional systems

TL;DR

This study investigates magnetoresistance behavior in a hybrid quantum system with an arc-shaped and a rectangular quantum point contact forming an electronic cavity, revealing a transition from resistance dip to peak with increased coupling.

Contribution

It introduces a novel hybrid quantum system setup and demonstrates the transition in magnetoresistance behavior as coupling strength varies.

Findings

Transition from resistance dip to magnetoresistance peak observed

Coupling strength influences magnetoresistance behavior

Hybrid quantum system shows potential for quantum technology applications

Abstract

In this work, we performed magnetoresistance measurement in a hybrid system consisting of an arc-shaped quantum point contact (QPC) and a flat, rectangular QPC, both of which together form an electronic cavity between them. The results highlight a transition between collimation-induced resistance dip to a magnetoresistance peak as the strength of coupling between the QPC and the electronic cavity was increased. The initial results show the promise of hybrid quantum system for future quantum technologies.