Quantum communications are revolutionising the way we transmit information and connect remote parties. Leveraging on the quantum properties of photons and on the tools developed for optical communications, it is now possible to create a quantum network that distributes confidential information to distant users with the highest level of security.
This emerging technology is a fundamental pillar of the so-called ‘second quantum revolution’, which aims to exploit quantum mechanics to develop new products and services for the good of society. It is at the same time capable of engaging industry and attracting substantial funding from governments worldwide. The U.K., in particular, is playing a leading role in the second quantum revolution and has invested in quantum technologies since 2013 through the UK National Quantum Technologies Programme.
Quantum communications can be established at any scale, from a few metres to hundreds of kilometres, like in an optical fibre network, or even thousands of kilometres, like in a ground-to-satellite link pair. However, coherently connecting users that are separated by a large distance remains an elusive target. The most promising solution to date is the protocol that came into existence in 2018 under the name of ‘Twin-Field Quantum Key Distribution’ (TF-QKD). It has the peculiarity of exploiting the phase relation between the light beams sent by distant users to create a shared key that can be used for cryptographic purposes.
In this project, you will perform experimental research on phase-based QKD protocols, and on TF-QKD in particular, to investigate the relation between the system’s parameters and its practical security. This will facilitate the future deployment of phase based QKD systems in real quantum networks and will inform the creation of forward-looking standards for the certification of quantum technologies. Both optical fibres and free space are propagation media of interest to the project.
This project is in collaboration with the National Physical Laboratory (NPL) in Teddington and with the Quantum Communications Hub. The student will be primarily located at NPL, with visits to York depending on the research requirements. We are seeking PhD candidates with suitable undergraduate training in physics, engineering or related subjects who are keen to research in quantum optics and its applications to communications.
For informal enquiry please contact Prof. Marco Lucamarini ([Email Address Removed]).
How to apply
Applicants must apply via the University’s online application system at https://www.york.ac.uk/study/postgraduate-research/apply/. Please read the application guidance first so that you understand the various steps in the application process. To apply, please select the PhD in Physics for October 2023 entry. Please specify in your PhD application that you would like to be considered for this studentship.
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