@article{9a7172f4a7ba417da974aec0bc960947,
title = "Coherent spin control of s-, p-, d- and f-electrons in a silicon quantum dot",
abstract = "Once the periodic properties of elements were unveiled, chemical behaviour could be understood in terms of the valence of atoms. Ideally, this rationale would extend to quantum dots, and quantum computation could be performed by merely controlling the outer-shell electrons of dot-based qubits. Imperfections in semiconductor materials disrupt this analogy, so real devices seldom display a systematic many-electron arrangement. We demonstrate here an electrostatically confined quantum dot that reveals a well defined shell structure. We observe four shells (31 electrons) with multiplicities given by spin and valley degrees of freedom. Various fillings containing a single valence electron—namely 1, 5, 13 and 25 electrons—are found to be potential qubits. An integrated micromagnet allows us to perform electrically-driven spin resonance (EDSR), leading to faster Rabi rotations and higher fidelity single qubit gates at higher shell states. We investigate the impact of orbital excitations on single qubits as a function of the dot deformation and exploit it for faster qubit control.",
author = "Leon, {R. C.C.} and Yang, {C. H.} and Hwang, {J. C.C.} and Lemyre, {J. Camirand} and T. Tanttu and W. Huang and Chan, {K. W.} and Tan, {K. Y.} and Hudson, {F. E.} and Itoh, {K. M.} and A. Morello and A. Laucht and M. Pioro-Ladri{\`e}re and A. Saraiva and Dzurak, {A. S.}",
note = "Funding Information: We acknowledge support from the US Army Research Office (W911NF-17-1-0198), the Australian Research Council (CE170100012), and the NSW Node of the Australian National Fabrication Facility. The views and conclusions contained in this document are those of the authors and should not be interpreted as representing the official policies, either expressed or implied, of the Army Research Office or the U.S. Government. The U. S. Government is authorized to reproduce and distribute reprints for Government purposes notwithstanding any copyright notation herein. J.C. and M.P. acknowledge support from the Canada First Research Excellence Fund and in part by the National Science Engineering Research Council of Canada. K.Y.T. acknowledges support from the Academy of Finland through project Nos. 308161, 314302 and 316551. Funding Information: The authors declare the following competing interests: This work was funded, in part, by Silicon Quantum Computing Proprietary Limited. Publisher Copyright: {\textcopyright} 2020, The Author(s).",
year = "2020",
month = dec,
day = "1",
doi = "10.1038/s41467-019-14053-w",
language = "English",
volume = "11",
journal = "Nature Communications",
issn = "2041-1723",
publisher = "Nature Publishing Group",
number = "1",
}