Sound-driven single-electron transfer in a circuit of coupled quantum rails
Barnes, Crispin H. W.
Santos, Paulo V.
Nature Publishing Group UK
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Takada, S., Edlbauer, H., Lepage, H. V., Wang, J., Mortemousque, P., Georgiou, G., Barnes, C. H. W., et al. (2019). Sound-driven single-electron transfer in a circuit of coupled quantum rails. Nature Communications, 10 (1)https://doi.org/10.1038/s41467-019-12514-w
Abstract: Surface acoustic waves (SAWs) strongly modulate the shallow electric potential in piezoelectric materials. In semiconductor heterostructures such as GaAs/AlGaAs, SAWs can thus be employed to transfer individual electrons between distant quantum dots. This transfer mechanism makes SAW technologies a promising candidate to convey quantum information through a circuit of quantum logic gates. Here we present two essential building blocks of such a SAW-driven quantum circuit. First, we implement a directional coupler allowing to partition a flying electron arbitrarily into two paths of transportation. Second, we demonstrate a triggered single-electron source enabling synchronisation of the SAW-driven sending process. Exceeding a single-shot transfer efficiency of 99%, we show that a SAW-driven integrated circuit is feasible with single electrons on a large scale. Our results pave the way to perform quantum logic operations with flying electron qubits.
Article, /639/925/927/481, /639/766/25/3927, /639/766/119/995, /639/766/483/2802, /120, /147/135, /144, /142/126, article
External DOI: https://doi.org/10.1038/s41467-019-12514-w
This record's URL: https://www.repository.cam.ac.uk/handle/1810/311180