Coherent beam splitting of flying electrons driven by a surface acoustic wave

Abstract

We develop a coherent beam splitter for single electrons driven through two tunnel-coupled quantum wires by surface acoustic waves (SAWs). The output current through each wire oscillates with gate voltages to tune the tunnel-coupling and potential difference between the wires. This oscillation is assigned to coherent electron tunneling motion that can be used to encode a flying qubit and is well reproduced by numerical calculations of time evolution of the SAW-driven single electrons. The oscillation visibility is currently limited to about 3%, but robust against decoherence, indicating that the SAW-electron can serve as a novel platform for a solid-state flying qubit.

arXiv comment5+3 pages, 4+2 figures

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Cited by in corpus (8)

• Coulomb-mediated antibunching of an electron pair surfing on sound
• Generation of a single-cycle acoustic pulse: a scalable solution for transport in single-electron circuits
• Electron qubits surfing on acoustic waves: review of recent progress
• Semiconductor-based electron flying qubits: Review on recent progress accelerated by numerical modelling
• Single electron routing in a silicon quantum-dot array
• Coulomb collisions of hot and cold single electrons in series-coupled silicon single-electron pumps
• On-Demand Single-Electron Source via Single-Cycle Acoustic Pulses
• Suppression of Electromagnetic Crosstalk by Differential Excitation for SAW Generation