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Article Dans Une Revue Nature Communications Année : 2019

Sound-driven single-electron transfer in a circuit of coupled quantum rails

Junliang Wang
Tristan Meunier

Résumé

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.
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Dates et versions

hal-02346609 , version 1 (25-08-2023)

Identifiants

Citer

Hugo V. Lepage, Hermann Edlbauer, Shintaro Takada, Pierre-André Mortemousque, Junliang Wang, et al.. Sound-driven single-electron transfer in a circuit of coupled quantum rails. Nature Communications, 2019, 10, pp.4557. ⟨10.1038/s41467-019-12514-w⟩. ⟨hal-02346609⟩
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