[School of Natural Sciences PhD Scholarships] Heterogenous quantum-dot–rubidium interfaces: photon generation, storage and conversion for quantum networks

About the project

About the Project Long-distance quantum communication is limited by photon loss in optical fibre. Heterogeneous quantum repeaters that combine deterministic III–V quantum-dot (QD) sources with room-temperature alkali-vapour memories offer a practical route to high-rate, fibre-compatible networks (Zajac et al., arXiv:2503.13775). This architecture underpinned Dr Joanna Zajac’s U.S. Department of Energy Early Career Research Award, and this PhD is a direct continuation of that programme. The project will develop hybrid QD–Rb interfaces for frequency conversion and subsequent storage of single photons in warm rubidium vapour. High-quality epitaxial III–V sources from established collaborators will provide the photonic input; the student will build and characterise the QD–vapour interface itself, using quantum-optical methods. Theory and modelling of EIT and four-wave mixing will guide the experiments, alongside group work on nanophotonic design and control of vapour properties. The student will work across device fabrication, cryogenic QD optics and atomic-vapour experiments, gaining hands-on experience in optical-setup design, III–V semiconductor physics, atomic physics, quantum optics and numerical modelling. The research targets scalable components for quantum networks and sensing, with regular interaction with partners in the UK, Europe and the US. Part of the project sits within a University of Manchester initiative on deployed testing of quantum telecommunications over metro-links led by Dr Zajac, giving the work a direct path from bench-top physics to applied network trials. 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 in physics-condensed matter, quantum optics or atomic physics (or international equivalent) OR any upper-second class (2:1) honours degree and a Master’s degree at merit in physics-condensed matter, quantum optics, atomic physics (or international equivalent). 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