Scalable Quantum Coupling of Silicon-Donor Spin Qubits

Project funded by Carlsberg Foundation (Internationalisation Fellowships), grant CF20-0484. Participating organisations named by the source: University of South Wales. Runs n/a to 2023-07-12. Source: OpenAIRE Graph, from the funder's project data (collected by OpenAIRE on 2025-08-01); national funding data, not CORDIS. Abstract given by the source: What? Quantum technologies and quantum computing are predicted to have revolutionary applications, by solving problems that are otherwise intractable even for the fastest classical supercomputers. A genuine quantum advantage, however, requires manufacturing and interconnecting millions of high-quality quantum bits. This project aims to demonstrate a scalable platform for coupling donor-based silicon qubits over long distances, providing the backbone for scaling up silicon-based quantum computers, as well as a rich platform for fundamental quantum science. Why? A fault-tolerant universal quantum computer is expected to consist of millions of high-quality quantum bits (qubits). A promising route is to adapt the manufacturing methods of the existing silicon nanoelectronic industry - capable of producing chips with billions of nanometer-scale silicon transistors at very low cost - to create spin-based qubits in silicon. For example, dopant atoms, commonly used to tune the electronic properties of semiconductors, act as natural two-level qubit systems. How? To achieve long-range coupling of donor-based qubits, I plan to develop resonator system that is compatible with the existing silicon spin qubits. This is the first step in achieving a coupling between the spin of the qubit system and photons in the resonators, which will allow coherent coupling of spatially separated qubits. In achieving this, I can take advantage of my previous experience in developing high quality, magnetic field-resilient resonators for hybrid superconducting/semiconducting systems. Combined with the existing efforts in the group and the state-of-the-art nanofabrication facilities, I believe this can be achieved in the given timeframe.

Original source.

Source: OpenAIRE Graph: projects of national funders, OpenAIRE, from the project data of Carlsberg Foundation. Retrieved 2026-11-02. Licence: Creative Commons Attribution 4.0 (OpenAIRE Graph). Selected metadata, adapted presentation; the publisher's record is authoritative. No endorsement by the source is implied. Licence: Creative Commons Attribution 4.0 (CC BY 4.0).

AI-assisted summary: The project "Scalable Quantum Coupling of Silicon-Donor Spin Qubits" is funded by the Carlsberg Foundation and involves the University of South Wales. It aims to create a scalable platform for coupling silicon qubits to advance quantum computing. Suggested technology pillar: computing. Generated by AI from the public source text; it may contain errors and the original source is authoritative.