Title:
Coherent Electron Optics with Ballistically Coupled Quantum Point Contacts
Author(s):
Freudenfeld, J.; Geier, M.; Umansky, V.; Brouwer, Piet W.; Ludwig, S.
Year of publication:
2020
Available Date:
2021-04-16T08:29:41Z
Abstract:
The realization of integrated quantum circuits requires precise on-chip control of charge carriers. Aiming at the coherent coupling of distant nanostructures at zero magnetic field, here we study the ballistic electron transport through two quantum point contacts (QPCs) in series in a three terminal configuration. We enhance the coupling between the QPCs by electrostatic focusing using a field effect lens. To study the emission and collection properties of QPCs in detail we combine the electrostatic focusing with magnetic deflection. Comparing our measurements with quantum mechanical and classical calculations we discuss generic features of the quantum circuit and demonstrate how the cohere
Part of Identifier:
e-ISSN (online): 0031-9007
Keywords:
Ballistic transport
Quantum interference effects
Transport phenomena
2-dimensional systems
Two-dimensional electron system
Methods in transport
Transport techniques
DDC-Classification:
539 Moderne Physik
Publication Type:
Wissenschaftlicher Artikel
URL of the Original Publication:
DOI of the Original Publication:
Journaltitle:
Physical Review Letters
Publisher:
American Physical Society
Publisher Place:
College Park, MD
Department/institution:
Physik
Institut für Theoretische Physik