From the first quantum computers to ultra-secure quantum networks, entangled particles of light play a key role in quantum technologies today. Perhaps even more interestingly, entanglement tells us something profound about the nature of reality itself. Entanglement is usually explored with the quantum versions of bits, or qubits, which are quantum states composed of “1s” and “0s.” However, quantum states encoded in the properties of a photon such as its position, momentum, time, and frequency can be much more complex, opening interesting new directions in quantum information science.  In this PhD project, you will explore new ways to control the spatial and temporal structure of light at the quantum level, and work towards the development of entanglement-based quantum technologies for communication and imaging. While the specific research direction of your PhD will be established during the first year of study, it will build on our existing research strengths in structured light, high-dimensional/multi-photon entanglement, complex scattering media, and noise-robust quantum communication. You will be supported if you wish to develop your teaching and/or public communication skills. During this project, you will develop significant expertise in theoretical and experimental quantum information science, with specific skills in programming, experimental quantum photonics, and entanglement theory. Throughout the project, you will have the opportunity to develop your communication skills and build your network through international/UK collaborative projects, publication of peer-reviewed papers, and presentations at UK/EU meetings and workshops. This position comes with the potential to travel and present your work at leading international conferences in the field. This PhD position is in the Beyond Binary Quantum Information (BBQ) Lab at Heriot-Watt University, Edinburgh. The BBQ Lab is led by Prof. Mehul Malik and consists of a dynamic team of researchers working at the forefront of the quantum technology revolution. You will conduct your research in the extensive photonics laboratory facilities of the BBQ Lab, which is funded by generous grants from the European Research Council (ERC), the UK Engineering and Physical Science Research Council (EPSRC), and the Royal Academy of Engineering. The BBQ Lab has significant links to leadings group in the EU/North America, and benefits from substantial resources available through Heriot-Watt’s membership in the UK National Quantum Technologies Programme. In addition, we have an ongoing partnership with the NASA Jet Propulsion Lab (JPL) Caltech that includes access to state-of-the-art superconducting detector technology being developed at JPL. For more details on our research, please have a look at our recent publications: https://bbqlab.org/publications/.