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Networking practical fibre-based photon-pair sources

Department of Physics

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Dr Peter Mosley , Dr Josh Nunn No more applications being accepted Funded PhD Project (Students Worldwide)
Bath United Kingdom Experimental Physics Optical Physics Quantum Mechanics

About the Project

The University of Bath is inviting applications for the following PhD project commencing in October 2021.

The goal of this project is to develop high-quality photon-pair sources in bespoke optical fibre and interface them with quantum memories that can store and retrieve the photons. The project will involve experimental work in a well-equipped laboratory alongside optical fibre fabrication in our state-of-the-art cleanroom facility. You will develop your analytic and computational skills as you model the devices that you will make.

The available PhD studentship is associated with the UK Quantum Technology Hub in Quantum Computation and Simulation (QCS) – a large national collaboration focused on developing technologies for quantum computation and quantum networks. Based in the Centre for Photonics and Photonic Materials (CPPM) in Bath, you will be integrated into this collaborative effort with the opportunity to present your results at Hub meetings as well as high-profile international conferences. Supervised by Dr Peter Mosley and Dr Josh Nunn, you will join a cohort of graduate students in the CPPM with direct support from a post-doctoral researcher.

High-quality single-photon sources are a critical component of future quantum networks for high-performance computation and secure communication. Combining sources with high-fidelity quantum memories in a fibre architecture will allow increased connectivity and flexibility, enabling future optical quantum processors to achieve their potential in fields such as simulation of pharmaceuticals and optimisation algorithms. You will apply recent advances in the design of fibres to increase performance and reduce noise in the four-wave mixing process that generates photon-pairs [1]. You will investigate the use of both transverse and longitudinal photonic structures to generate narrow-band photons, enhancing coupling efficiency to atomic vapour quantum memories [2].

We are seeking applicants who are keen to develop their laboratory skills through working with high-power short-pulse laser systems in a well-equipped lab. You will have the opportunity to learn how to design and fabricate your own optical fibre using the cleanroom facilities in the CPPM. You will also enhance your theory and coding skills by modelling the structures you make. You will be expected to take part in weekly Centre meetings including giving research and journal club presentations as well as participating in “Quantum Club“, the CPPM’s journal discussion group focused on quantum optics.

Candidate Requirements:

Applicants should hold, or expect to receive, a First Class or good Upper Second Class Honours degree (or the equivalent) in Physics or a related subject. A master’s level qualification would also be advantageous. While laboratory experience with lasers and optics is desirable but not essential, enthusiasm and motivation to carry out high-quality lab work is an essential requirement.

Non-UK applicants must meet our English language entry requirement.

Enquiries and Applications:

Informal enquiries are welcomed and should be directed to Dr Peter Mosley ([Email Address Removed]).

Formal applications should be made via the University of Bath’s online application form for a PhD in Physics.

More information about applying for a PhD at Bath may be found on our website.

Funding Notes

A 3.5-year studentship is available from the Quantum Computing & Simulation Hub (QCS). Funding covers tuition fees, a stipend (£15,285 p.a., 2020/21 rate) and an allowance for research expenses, training and conference attendance. QCS studentships are open to both Home and International students; however, in line with guidance from UK Research and Innovation (UKRI), the number of awards available to International candidates will be limited to 30% of the total.


1] R J A Francis-Jones et al, All-fiber multiplexed source of high-purity single photons, Optica 3, 1270 (2016)
[2] S E Thomas et al, Raman quantum memory with built-in suppression of four-wave mixing noise, Phys Rev A 100, 033801 (2019)

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