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Electrical Control and Quantum Chaos with a High-Spin Nucleus in Silicon

  • Book
  • © 2021

Overview

Authors:
  1. Serwan Asaad

    1. Niels Bohr Institute, University of Copenhagen, Copenhagen, Denmark

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  • Nominated as an outstanding Ph.D. thesis by the UNSW Sydney, Australia
  • Provides an in-depth explanation of high-spin donor physics in silicon
  • Demonstrates coherent electric control of a single high-spin donor

Part of the book series: Springer Theses (Springer Theses)

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Table of contents (9 chapters)

  1. Front Matter

    Pages i-xvii
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  2. Introduction

    • Serwan Asaad
    Pages 1-8

  3. High-Dimensional Spins

    • Serwan Asaad
    Pages 9-24

  4. Theory of Donors in Silicon

    • Serwan Asaad
    Pages 25-42

  5. Experimental Setup

    • Serwan Asaad
    Pages 43-58

  6. 123-Sb Donor Device Characterization

    • Serwan Asaad
    Pages 59-82

  7. Nuclear Electric Resonance

    • Serwan Asaad
    Pages 83-108

  8. Microscopic Crystalline Origins of the Quadrupole Interaction

    • Serwan Asaad
    Pages 109-129

  9. Exploring Quantum Chaos with a Single High-Spin Nucleus

    • Serwan Asaad
    Pages 131-162

  10. Conclusions and Outlook

    • Serwan Asaad
    Pages 163-176

  11. Back Matter

    Pages 177-198
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Keywords

About this book

Nuclear spins are highly coherent quantum objects that were featured in early ideas and demonstrations of quantum information processing. In silicon, the high-fidelity coherent control of a single phosphorus (31-P) nuclear spin I=1/2 has demonstrated record-breaking coherence times, entanglement, and weak measurements. In this thesis, we demonstrate the coherent quantum control of a single antimony (123-Sb) donor atom, whose higher nuclear spin I = 7/2 corresponds to eight nuclear spin states. However, rather than conventional nuclear magnetic resonance (NMR), we employ nuclear electric resonance (NER) to drive nuclear spin transitions using localized electric fields produced within a silicon nanoelectronic device. This method exploits an idea first proposed in 1961 but never realized experimentally with a single nucleus, nor in a non-polar crystal such as silicon. We then present a realistic proposal to construct a chaotic driven top from the nuclear spin of 123-Sb. Signatures of chaos are expected to arise for experimentally realizable parameters of the system, allowing the study of the relation between quantum decoherence and classical chaos, and the observation of dynamical tunneling. These results show that high-spin quadrupolar nuclei could be deployed as chaotic models, strain sensors, hybrid spin-mechanical quantum systems, and quantum-computing elements using all-electrical controls.

Authors and Affiliations

  • Niels Bohr Institute, University of Copenhagen, Copenhagen, Denmark

    Serwan Asaad

About the author

Serwan Asaad is a postdoctoral research fellow studying nonlocal physics and nonabelian statistics in Charlie Marcus’ group at the Niels Bohr Institute, University of Copenhagen. He completed his PhD at the University of New South Wales (UNSW) in Sydney, where he worked in the group of Andrea Morello on high-spin nuclei in silicon. He received the Malcolm Chaikin award for this work.

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