Communicating securely underwater – a quantum solution

Faculty of Science
Physics
Aerial photo of the campus, with a focus on the STEM Complex.
To many, the study of underwater quantum communication can seem overwhelming and rather puzzling. However, for Felix Hufnagel, a former MSc (now PhD) student at the University of Ottawa, it is in this complex field of physics that he excels.

In fact, Felix helped the Structured Quantum Optics (SQO) group establish a quantum communication channel through 30 m of uncontrolled water. By encoding information on single photons, Felix and the SQO group were able to detect disturbances introduced by a potential eavesdropper hacking the channel to ensure secure communication. Felix and his colleagues investigate techniques to apply to wide-ranging problems such as acquiring data from underwater research probes and conducting remote sensing, both of which have exciting applications for ocean climate research. A key component of underwater research requires custom-built optical plates. Felix is currently working on the fabrication of optical elements for applications in various fields of physics and for future collaborations with researchers across Canada.

Felix Hufnagel

Furthermore, Felix is very grateful for his incredible colleagues and mentors in the SQO group: Alicia Sit and Frédéric Bouchard (now a Research Associate at the National Research Council Canada). Felix also appreciates the opportunity the NRC offered his team to conduct research and explore this particular area of physics. Lastly, Felix acknowledges Prof. Ebrahim Karimi’s invaluable support throughout his MSc degree. Indeed, Felix recently began his PhD with Prof. Karimi as his supervisor once again, during which he plans to advance his research in quantum communications and quantum sensing, and to develop new optical elements. Moreover, he intends to work on two books detailing the current state of underwater quantum communication and the quantum aspects of structured light.

Finally, Felix believes that “it is important to spend your time on the things that excite you, and surround yourself with people that are as passionate about them as you are.” To balance the demanding work of scientific research, Felix plays on the men's volleyball team at the University of Ottawa. Team captain for the past three years, he savours the victories achieved through hard work.

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