In a world where quantum technology is shaping the future of information technology, we find ourselves at the threshold of a groundbreaking era in communication. Quantum communications harness the unique properties of photons and the optical communication tools developed over the years, enabling us to distribute quantum coherence and secure information to distant recipients, thus paving the way for the quantum internet of tomorrow.

This emerging technology has captivated the interest of both academic and industrial sectors, with governments worldwide investing substantial resources. Notably, the United Kingdom, under its National Quantum Technologies Programme, has been a prominent supporter of quantum technologies since 2013 and recently announced a £2.5 billion National Quantum Strategy.

Quantum communication can be achieved over various distances, from a few metres to hundreds of kilometres using optical fibres, and even thousands of kilometres with ground-to-satellite links. However, establishing coherent connections between users separated by significant distances remains a formidable challenge. The most promising solution to date is the phase-based protocol known as 'Twin-Field Quantum Key Distribution' (TF-QKD), which emerged in 2018 [1]. This protocol leverages the phase relationship between light beams sent by distant users to create a shared cryptographic key.

In this research project, we invite you to embark on an experimental journey into phase-based QKD protocols designed for long-distance communications, such as TF-QKD, over free-space channels. Your work will facilitate the future deployment of phase-based QKD systems in real-world quantum networks and contribute to the development of interfaces bridging the gap between free-space and fibre-based channels.

This project is in collaboration with the Quantum Communications Hub. It offers fully funded studentships (see funding notes) and it will remain open until the position is filled. You will primarily work at the University of York, which boasts cutting-edge equipment for optical free-space links. However, opportunities for visits to relevant research centres may be considered for training purposes. The project is experimental in nature and primarily involves device control and programming. We are seeking enthusiastic PhD candidates with suitable undergraduate training in physics, engineering, computer science, or related disciplines, especially those with a personal interest in the engineering aspects of the experimental work, such as an optical Pointing Acquisition and Tracking (PAT) system for communication links [2].

Academic Entry Requirements: At least a class 2:1 MSc or MPhys degree in Physics or equivalent degree accredited by an international institution.

For informal enquiries please contact Dr. Rupesh Kumar (rupesh.kumar@york.ac.uk) or Prof. Marco Lucamarini (marco.lucamarini@york.ac.uk).

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 September 2024 entry. Please specify in your PhD application that you would like to be considered for this studentship.

Funding Notes: This studentship covers the tuition fee at home rate (£4,712 in 2023/24), an annual stipend at standard research council rate for a period up to 3.5 years (£18,622 in 2023/24) and a research training and support grant (RTSG). UK and international students are eligible. Please refer to UKRI website (View Website) for full criteria. Only a limited number of fully funded international awards available each year (international fee waivers). Be aware they cannot be guaranteed at the time this position is advertised.

Applications are considered on a first-come, first-served basis and be filled as soon as a suitable applicant is identified.

References:
[1] https://www.nature.com/articles/s41586-018-0066-6
[2] http://hdl.handle.net/1721.1/115686