Small spin-qubit registers defined by single electrons confined in Si/SiGe quantum dots operate successfully and connecting these would permit scalable quantum computation. Shuttling the qubit carrying electrons between registers is a natural choice for high-fidelity coherent links provided the overhead of control signals stays moderate. Our proof-of-principle demonstrates shuttling of a single electron by a propagating wave-potential in an electrostatically defined 420 nm long Si/SiGe quantum-channel. This conveyor-mode shuttling approach requires independent from its length only four sinusoidal control signals. We discuss the tuning of the signal parameters, detect the smoothness of the electron motion enabling the mapping of potential disorder and observe a high single-electron shuttling fidelity of $99.42\pm0.02\,\%$ including a reversal of direction. Our shuttling device can be readily embedded in industrial fabrication of Si/SiGe qubit chips and paves the way to solving the signal-fanout problem for a fully scalable semiconductor quantum-computing architecture.
QuTech and Kavli Institute of Nanoscience, Delft University of Technology（代尔夫特理工大学奎克研究所和卡弗里纳米科学研究所）；Instituto de Ciencia de Materiales de Madrid ICMM, CSIC（马德里材料科学研究所）；Netherlands Organization for Applied Scientific Research (TNO)（荷兰应用科学研究组织）；Institute of Physics, University of Augsburg（奥格斯堡大学物理研究所）；Quantum Advanced Research Center (QuARC), CSIC（量子先进研究中心）
Using a spin-triplet encoding to enhance shuttling fidelities in Si/SiGe quantum wells
University of Wisconsin-Madison（威斯康星大学麦迪逊分校）；National Institute of Standards and Technology（美国国家标准与技术研究院）；Joint Center for Quantum Information and Computer Science, University of Maryland（马里兰大学量子信息与计算科学联合中心）；School of Physics, University of New South Wales（新南威尔士大学物理学院）
Numerical simulation of coherent spin-shuttling in a QuBus with charged defects
JARA-FIT Institute for Quantum Information, Forschungszentrum Jülich GmbH and RWTH Aachen University（JARA-FIT量子信息研究所，于利希研究中心和亚琛工业大学）；Weierstrass Institute for Applied Analysis and Stochastics (WIAS)（魏尔斯特拉斯应用分析与随机性研究所）；ARQUE Systems GmbH（ARQUE系统有限公司）
Coherence Protection for Mobile Spin Qubits in Silicon
Leiden University（莱顿大学）；Delft University of Technology（代尔夫特理工大学）；QuTech；Kavli Institute of Nanoscience, Delft University of Technology（代尔夫特理工大学卡弗里纳米科学研究所）；Netherlands Organization for Applied Scientific Research (TNO)（荷兰应用科学研究组织）
