Journal article
Navigating the 16-dimensional Hilbert space of a high-spin donor qudit with electric and magnetic fields
I Fernández de Fuentes, T Botzem, MAI Johnson, A Vaartjes, S Asaad, V Mourik, FE Hudson, KM Itoh, BC Johnson, AM Jakob, JC McCallum, DN Jamieson, AS Dzurak, A Morello
Nature Communications | NATURE PORTFOLIO | Published : 2024
Open access
Abstract
Efficient scaling and flexible control are key aspects of useful quantum computing hardware. Spins in semiconductors combine quantum information processing with electrons, holes or nuclei, control with electric or magnetic fields, and scalable coupling via exchange or dipole interaction. However, accessing large Hilbert space dimensions has remained challenging, due to the short-distance nature of the interactions. Here, we present an atom-based semiconductor platform where a 16-dimensional Hilbert space is built by the combined electron-nuclear states of a single antimony donor in silicon. We demonstrate the ability to navigate this large Hilbert space using both electric and magnetic field..
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Awarded by Army Research Office
Funding Acknowledgements
We acknowledge discussions with R. Blume-Kohout, K. Rudinger, T. Proctor and C. I. Ostrove. The research was funded by an Australian Research Council Discovery Project (grant no. DP210103769), 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 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. I.F.d.F. and A.V. acknowledge support from the Sydney Quantum Academy. 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 U.S. 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.