Meeting Amar Bellahsene: At the Heart of Quantum Fluids of Light

• Can you tell us about your academic career so far and what led you to choose this area of research?

I completed my bachelor’s degree in fundamental physics at the University of Lille, where I discovered my interest in optics and thermodynamics, subjects that really stimulated my curiosity. I then chose to continue with a master’s degree at the University of Strasbourg, mainly because of the strong focus on advanced statistical physics. During my studies, I had the opportunity to do a long internship in Heidelberg, in Prof. Matthias Weidemüller’s group, which specializes in experimental simulations of complex quantum systems using cold atoms. Although my work there was mainly theoretical, I was also introduced to the complexity of a cold atom experiment. That experience really convinced me that I wanted to continue in experimental physics, and especially in the field of cold atoms. This is what led me to join the group of Pr. Shannon Whitlock and Dr. Tom Bienaimé in Strasbourg, where I now work on the realization of Quantum Fluids of Light in cold atomic medium, in other words, studying how light can behave collectively when it propagates through a cloud of ultracold atoms.

• What does the research environment at CESQ bring you (professionally and personally)?

At CESQ, I’m lucky to work in a very collaborative environment. My colleagues are not only good scientists but also great people. We share ideas easily, help each other in the lab, and even enjoy activities together, like playing ping pong. It really creates a friendly atmosphere that makes research enjoyable.

• What are your wishes and plans for the future of your career?

In the future, I would like to keep working in the field of cold atoms, either through an academic career or in industry. I’m particularly interested in exploring fundamental phenomena such as effective photon interactions in quantum fluids of light, and how cold atom systems can be used to engineer these interactions. This combination of fundamental research and potential technological applications really motivates me. I’m also curious about quantum sensing, where here also, fundamental physics meets practical applications.

• What do you like about your life in Strasbourg?

What I really like about living in Strasbourg is the balance it offers between a dynamic city and very peaceful and pleasant to live in. I also enjoy the architecture. And of course, I also appreciate the friendly atmosphere, both at work and outside the lab!

• If you were to name the one thing you are most proud of (career-wise or in your personal life), what would it be?

If I had to choose one thing, I would say I’m most proud of having maintained my passion for research (the same excitement I had on my very first day in a lab) despite some personal challenges that life inevitably brings. That motivation continues to drive me every day.