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

Sound-driven single-electron transfer in a circuit of coupled quantum rails
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耦合量子轨电路中声音驱动的单电子转移

DOI:
10.1038/s41467-019-12514-w
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发表时间:
2019
影响因子:
16.6
通讯作者:
C. Bäuerle
C. Bäuerle
中科院分区:
综合性期刊1区
文献类型:
--
作者:
S. Takada;H. Edlbauer;H. V. Lepage;J. Wang;P.-A. Mortemousque;G. Georgiou;C. H. W. Barnes;C. J. B. Ford;M. Yuan;P. V. Santos;X. Waintal;A. Ludwig;A. D. Wieck;M. Urdampilleta;T. Meunier ;C. Bäuerle

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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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