Journal article
Tomography of entangling two-qubit logic operations in exchange-coupled donor electron spin qubits
HG Stemp, S Asaad, MRV Blankenstein, A Vaartjes, MAI Johnson, MT Mądzik, AJA Heskes, HR Firgau, RY Su, CH Yang, A Laucht, CI Ostrove, KM Rudinger, K Young, R Blume-Kohout, FE Hudson, AS Dzurak, KM Itoh, AM Jakob, BC Johnson Show all
Nature Communications | NATURE PORTFOLIO | Published : 2024
Abstract
Scalable quantum processors require high-fidelity universal quantum logic operations in a manufacturable physical platform. Donors in silicon provide atomic size, excellent quantum coherence and compatibility with standard semiconductor processing, but no entanglement between donor-bound electron spins has been demonstrated to date. Here we present the experimental demonstration and tomography of universal one- and two-qubit gates in a system of two weakly exchange-coupled electrons, bound to single phosphorus donors introduced in silicon by ion implantation. We observe that the exchange interaction has no effect on the qubit coherence. We quantify the fidelity of the quantum operations usin..
View full abstractRelated Projects (1)
Grants
Funding Acknowledgements
This research was funded by the Australian Research Council Centre of Excellence for Quantum Computation and Communication Technology (CE170100012) and the US Army Research Office (Contracts no. W911NF-17-1-0200 and W911NF-23-1-0113). We acknowledge the facilities, and the scientific and technical assistance provided by the UNSW node of the Australian National Fabrication Facility (ANFF), and the Heavy Ion Accelerators (HIA) nodes at the University of Melbourne and the Australian National University. ANFF and HIA are supported by the Australian Government through the National Collaborative Research Infrastructure Strategy (NCRIS) programme. H.G.S., M.R.v.B., A.V. acknowledge support from the Sydney Quantum Academy. C.I.O, K.M.R, K.C.Y, and R.J.B-K acknowledge funding in part by the U.S. Department of Energy, Office of Science, Office of Advanced Scientific Computing Research Quantum Testbed Pathfinder Programme. 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 authorised to reproduce and distribute reprints for Government purposes, notwithstanding any copyright notation herein. Sandia National Laboratories is a multimission laboratory managed and operated by National Technology & Engineering Solutions of Sandia, LLC, a wholly-owned subsidiary of Honeywell International Inc., for the U.S. Department of Energy's National Nuclear Security Administration under contract DE-NA0003525. This paper describes objective technical results and analysis. Any subjective views or opinions that might be expressed in the paper do not necessarily represent the views of the U.S. Department of Energy or the United States Government.