Work

On-Demand and Tunable Andreev Conversion of Single-Electron Charge Pulses

Year: 2025

Type: article

Abstract: Electron quantum optics explores coherent single-electron charge pulse propagation in electronic nanoscale circuits akin to tabletop photon setups. While past experiments focused on normal-state conductors, incorporating superconductors holds promise for exploiting the electron-hole degree of freedom in quantum sensing applications and quantum information processing. Here, we propose and analyze an on-demand and tunable mechanism for converting single-electron pulses into holes through Andreev processes on a superconductor. We develop a Floquet-Nambu scattering formalism to demonstrate the dynamic conversion of charge pulses and the controllable generation of coherent electron-hole superpositions through interferometric magnetic flux control based on the chiral edge states of a quantum Hall sample. Our discussion covers optimal conditions in realistic scenarios, affirming the feasibility of our proposal with current technology.

Source: Physical Review Letters

DOI: 10.1103/lfsm-z1sl

Authors: Pablo Burset, Benjamin Roussel, Michael Moskalets, Christian Flindt

Institutions: Universidad Autónoma de Madrid, Aalto University, Consejo Superior de Investigaciones Científicas, Institute for Cross-Disciplinary Physics and Complex Systems, National Technical University "Kharkiv Polytechnic Institute"

Language: English

Topic: Quantum and electron transport phenomena

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funders: Academy of Finland, Consejo Superior de Investigaciones Científicas, Agencia Estatal de Investigación

Awards: G2109078276, G225243530, G5283148391, G7870925207