Journal article
Precision tomography of a three-qubit donor quantum processor in silicon
MT Mądzik, S Asaad, A Youssry, B Joecker, KM Rudinger, E Nielsen, KC Young, TJ Proctor, AD Baczewski, A Laucht, V Schmitt, FE Hudson, KM Itoh, AM Jakob, BC Johnson, DN Jamieson, AS Dzurak, C Ferrie, R Blume-Kohout, A Morello
Nature | NATURE PORTFOLIO | Published : 2022
Abstract
Nuclear spins were among the first physical platforms to be considered for quantum information processing1,2, because of their exceptional quantum coherence3 and atomic-scale footprint. However, their full potential for quantum computing has not yet been realized, owing to the lack of methods with which to link nuclear qubits within a scalable device combined with multi-qubit operations with sufficient fidelity to sustain fault-tolerant quantum computation. Here we demonstrate universal quantum logic operations using a pair of ion-implanted 31P donor nuclei in a silicon nanoelectronic device. A nuclear two-qubit controlled-Z gate is obtained by imparting a geometric phase to a shared electro..
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Grants
Awarded by U.S. Department of Energy
Funding Acknowledgements
We acknowledge conversations with W.Huang, R.Rahman, S.Seritan and C.H. Yang and technical support from T.Botzem. The research was supported by the Australian Research Council (grant no. CE170100012), the US Army Research Office (contract no. W911NF-17-1-0200), and the Australian Department of Industry, Innovation and Science (grant no. AUSMURI000002). We acknowledge support from the Australian National Fabrication Facility (ANFF). This material is based upon work supported in part by the iHPC facility at the University of Technology Sydney (UTS), by the US Department of Energy, Office of Science, Office of Advanced Scientific Computing Research's Quantum Testbed Pathfinder and Early Career Research Programs, and by the US Department of Energy, Office of Science, National Quantum Information Science Research Centers (Quantum Systems Accelerator). Sandia National Laboratories is a multimission laboratory managed and operated by National Technology and Engineering Solutions of Sandia, LLC, a wholly owned subsidiary of Honeywell International, Inc., for the US Department of Energy's National Nuclear Security Administration under contract DE-NA0003525. All statements of fact, opinion or conclusions contained herein are those of the authors and should not be construed as representing the official views or policies of the US Department of Energy, or the US Government.