University of Southampton
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PhD Project in Quantum Frequency Conversion for Hybrid Quantum Networks University of Southampton in United Kingdom
Degree Level
PhD
Field of study
Atomic Physics
Funding
The project is competition funded. Further fees and funding details are available through the University of Southampton funding information.
Deadline
Jul 31, 2027
Country
United Kingdom
University
University of Southampton
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About this position
This PhD project will develop high-bandwidth quantum frequency converters for future hybrid quantum networks. The research addresses a central challenge in quantum networking: quantum technologies often operate at incompatible optical wavelengths. Visible single-photon sources, telecom communication channels and atomic quantum memories therefore require interfaces capable of translating photons between wavelength regimes.
The project will use four-wave mixing in warm rubidium vapour to develop two complementary frequency-conversion interfaces. One will convert visible photons at 630 nm from hexagonal boron nitride single-photon sources, while the other will convert telecom photons at 1529 nm from quantum communication channels. Both interfaces will target conversion to 795 nm in the near-infrared, enabling direct interfacing with atomic quantum memories.
You will build and investigate atomic-physics experiments and laser systems, study nonlinear light-matter interactions, and characterise conversion efficiency, bandwidth and noise. The work will progress from continuous-wave spectroscopy to nanosecond optical pulses and ultimately quantum frequency conversion at the single-photon level.
The project is part of the international AL FreSQO collaboration. This provides opportunities to work alongside researchers developing hBN single-photon sources, atomic quantum memories and free-space quantum communication links, as well as to engage with collaborators and industrial partners in the UK and abroad. The research environment offers experience in experimental quantum optics, nonlinear optics, atomic physics, lasers, high-speed optical control and single-photon detection.
Funding details
The project is competition funded. Further fees and funding details are available through the University of Southampton funding information.
What's required
Applicants require a 2:1 honours degree. The project is suited to applicants interested in experimental quantum optics, nonlinear optics, atomic physics, laser systems, high-speed optical control and single-photon detection.
How to apply
Review the project and the University of Southampton's postgraduate research application guidance, then submit an application for the Doctor of Philosophy project through the university's application process before 31 July 2027.
Make your next move.
Prepare your application
Review drafts and confirm requirements with the university.
Make your next move.
Prepare your application
Review drafts and confirm requirements with the university.