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Claude Cohen Tannoudji

Prix Nobel en 1997 pour le ralentissement et le piégeage des atomes par la lumière laser.

Ses travaux sont à la source des recherches actuelles de l'IFRAF.



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Accueil du site > Equipes de recherche > Équipes IFRAF > Laboratoire Charles Fabry > Quantum Optics – Team Atoms

Quantum Optics – Team Atoms

The team studies the properties of a small number of interacting atoms (2-100). One experiment uses the dipole-dipole interaction between individual Rydberg atoms to perform quantum simulation or quantum calculation tasks. The second experiment explores the collective properties of a dense ensemble of a few hundred cold atoms.

Observation of the Rydberg blockade between two atoms separated by 4 micrometers. The red curve is the probability of excitation of one atom to a Rydberg state as a function of the duration of the excitation. The black squares are the probability to excite simultaneously the two atoms when they interact : its strong suppression is the signature of the blockade. The blue curve shows the probability to excite one of the two atoms in the blockade regime : the oscillation frequency is enhanced by √2, which indicates the collective excitation of the two atoms.

Time-of-flight of a single atom. Each image is the fluorescence light emitted by a single atom released from an optical tweezers exposed to a short pulse of resonant light, collected on a camera with single photon sensitivity. From the size of the image, one extracts the average energy of a single atom.

Team leader : Antoine Browaeys, Chargé de recherche

Other members :

Thierry Lahaye, Chargé de recherche
Yvan Sortais, Maître de conférences
Aline Vernier, Postdoc
Lucas Beguin, Doctorant
Ronan Bourgain, Doctorat
Joseph Pellegrino, Doctorant
Sylvain Ravets, Doctorant