Focused Ion Beam Isotopic Engineering and Electrical Detection of Group-V Donors for Silicon-Based Quantum Computation

Erscheinungsjahr 2026
ISBN: 978-3-032-32345-3
Verlag: Springer

Buch, Englisch, 148 Seiten, Format (B × H): 155 mm x 235 mm

Reihe: Springer Theses

This book reports experimental work delivering a route to the successful isotopic enrichment of 28-silicon for providing a solid-state spin vacuum platform suitable for quantum computing. The levels of isotopic purification achieved reduce the nuclear spin carrying 29-silicon isotope to below 3 parts-per-million (ppm), while also reducing 30-silicon to below 1 ppm and removing other impurities. The book also presents the first reported electrically detected magnetic resonance spectroscopy study of the magnetic clock transition in 75-arsenic doped silicon. This is of interest to those developing donor-based qubit systems for quantum technologies as these transitions show reduced sensitivity to otherwise deleterious magnetic field fluctuations. Overall, the thesis represents a significant advance in the state-of-the-art relating to advanced semiconductor platforms for quantum technologies.

Zielgruppe

Research

Autoren/Hrsg.

Acharya, Ravi

Fachgebiete

• Mathematik | Informatik EDV | Informatik Informatik Mathematik für Informatiker
• Naturwissenschaften Chemie Analytische Chemie Magnetresonanz
• Technische Wissenschaften Elektronik | Nachrichtentechnik Elektronik Elektronische Baugruppen, Elektronische Materialien
• Naturwissenschaften Physik Thermodynamik Festkörperphysik, Kondensierte Materie
• Naturwissenschaften Physik Quantenphysik

Inhaltsverzeichnis

Introduction.- Introduction to quantum computing.- Donors in silicon.- Experimental methods.- Isotopic enrichment of silicon using a focused ion beam.- Electrical detection of donors in silicon.- Conclusions and outlook.

Über Autor(innen)

Ravi Acharya attended the University of Manchester, including a year abroad at the University of Illinois at Urbana-Champaign, and received an M.Phys. (Hons) degree in 2021. He subsequently began a joint Ph.D. program between the University of Melbourne and University of Manchester, focusing on the development and characterization of materials for semiconductor spin-based quantum computing. His doctoral research investigated methods for producing highly coherent group-V donor spin qubits in silicon, specifically the generation of high purity 28-silicon and the exploitation of donor magnetic clock transitions, both of which reduce the magnetic noise affecting the donor spin. He was awarded a joint DPhil degree from both institutes in June 2025.