[School of Natural Sciences PhD Scholarships] Scalable Superconducting Bosonic Qubits Using Waveguide-Integrated Split-Ring Resonators

About the project

About the Project Superconducting quantum processors are among the leading technologies for quantum computing, but scaling them to large numbers of qubits remains challenging. Current systems require complex microwave control, extensive cryogenic wiring, sophisticated packaging and very low operating temperatures. This PhD project will investigate a new approach to superconducting quantum hardware that aims to simplify this architecture while preserving the coherence needed for quantum information processing. The project will develop a novel qubit platform based on superconducting split-ring resonators (SRRs) and complementary split-ring resonators (CSRRs). These structures can support high-quality-factor microwave modes and will be used as quantum storage elements. Rather than using the nonlinear Josephson device itself as the primary quantum memory, the proposed architecture separates the storage function from the nonlinear elements used for control and readout. This separation could offer important advantages for coherence, packaging and future scalability. A key feature of the project will be the integration of the SRR/CSRR devices with microwave waveguides. The student will explore whether operating the storage resonator below the waveguide propagation cutoff can provide strong electromagnetic isolation and suppress unwanted radiative loss. The project will then integrate the resonator with superconducting Josephson-junction ancillas for quantum control and measurement. The work will combine electromagnetic modelling, microwave engineering, superconducting-device fabrication and cryogenic quantum measurement. The student will gain hands-on experience in finite-element simulation, cleanroom fabrication, sub-K cryogenics, low-noise microwave measurements, qubit spectroscopy, time-domain measurements, automated experimental control and scientific data analysis. As the project develops, the student will move from classical resonator characterisation to quantum-state preparation and readout, with the long-term aim of demonstrating a bosonic logical qubit, for example using a cat-state encoding. The project will also investigate how the architecture could be extended towards modular and scalable quantum systems. The PhD will be jointly supported by the University of Manchester and SPINOR, a start-up company developing advanced quantum and cryogenic technologies. This will give the student a rare opportunity to work at the interface between fundamental quantum physics and technology development, gaining experience of both academic research and industrial innovation. This project is expected to start in September 2027. Before you apply: We strongly recommend that you contact the supervisors for this project before you apply. How to apply: To be considered for this project you must complete a formal application through our online application portal. If you already have an applicant account this link will directly open an application for PhD School of Natural Sciences Scholarships . If you don’t already have an applicant account, please follow the instructions here . When applying, please specify the full title and supervisor/s of the project, details of your previous study, and names and contact details of two referees. You must also upload a Supporting Statement describing your motivation to apply to the project, your CV and transcripts of awarded and in-progress university qualifications . Please note late or incomplete applications will not be considered. Equality, diversity and inclusion are fundamental to the success of The University of Manchester and central to all our activities. A diverse research community strengthens creativity, productivity and quality, while increasing the societal and economic impact of our work. We welcome applicants from all career paths, backgrounds and sections of the community, regardless of age, disability, ethnicity, gender, gender expression, sexual orientation or transgender status. We welcome applications from candidates returning to study after a career break or experience in other roles. Flexible study arrangements may be available, including part-time study at 50%, 60% or 80%, subject to the requirements of the project and funder. Eligibility : The standard academic entry requirement for this PhD is an upper second-class (2:1) honours degree (or international equivalent) in Physics, Electrical/Electronic Engineering, Applied Physics or Quantum Engineering OR any upper-second class (2:1) honours degree and a Master’s degree at merit (or international equivalent) in Physics, Electrical/Electronic Engineering, Applied Physics or Quantum Engineering. Previous research experience in microwave measurements, electromagnetic simulation, low-temperature physics, microfabrication, quantum mechanics or scientific programming would be beneficial, but full project-specific training will be provided. Candidates should be comfortable working across physics and engineering disciplines and should have an interest in both fundamental research and the translation of new quantum technologies towards practical applications. This project will remain open until filled. If your application is submitted by 1 st November 2026, you can expect a decision by 18 th December 2026. If your application is submitted by 15 th January 2027, you can expect a decision by 30 th March 2027. Self or externally funded students can also be considered for this project. FSESoNS

Research areas