My research background:
After completing my PhD thesis on the quantum properties of light at Sorbonne Université (formerly Université Paris 6), I spent a post-doctoral period at the Australian National University in Canberra, where I used these quantum light effects on ultra-cold atoms.
Once I became associate professor at the Laboratoire de Physique des Lasers at Sorbonne Paris Nord, my research focused on the study of ultracold flattened (two-dimensional) quantum gases. For some years now, we have been studying the superfluid properties of such gases, which do not rotate like conventional gases. We also produce superfluid rings that we set in rotation, and observe the microscopic effects that can modify the ring’s rotation speed.
These studies have potential applications in the field of quantum measurement of system rotation, as well as in quantum simulation and quantum information.
Courses taught:
- Physique Quantique 1 : Lumière et matière en physique quantique
- Physique pour les Technologies Quantiques 2 : Lignes, guides, fibres
Research themes:
- Ultracold atoms
- Superfluidity
- Out-of-equilibrium systems
- Atomtronics

A few selected articles
- Rishabh Sharma, David Rey, Laurent Longchambon, Aurélien Perrin, Hélène Perrin, and Romain Dubessy, «Thermal Melting of a Vortex Lattice in a Quasi-Two-Dimensional Bose Gas», Phys. Rev. Lett. 133, 143401 (2024).
DOI: 10.1103/PhysRevLett.133.143401- Yanliang Guo, Romain Dubessy, Mathieu de Goër de Herve, Avinash Kumar, Thomas Badr, Aurélien Perrin, Laurent Longchambon, and Hélène Perrin, «Supersonic Rotation of a Superfluid: A Long-Lived Dynamical Ring», Phys. Rev. Lett. 124, 025301 (2020).
DOI: 10.1103/PhysRevLett.124.025301