648 citations · 2k across the 24 of their papers we have counts for
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Phase space density limitation in laser cooling without spontaneous emission
Thierry Chanelière, Daniel Comparat, Hans Lignier
We study the possibility to enhance the phase space density of non-interacting particles submitted to a classical laser field without spontaneous emission. We clearly state that, w…
Bichromatic magneto-optical trapping for configurations
Anne Cournol, Pierre Pillet, Hans Lignier +1
A magneto-optical trap (MOT) of atoms or molecules is studied when two lasers of different detunings and polarization are used. Especially for transitions, a s…
Wave Function Renormalization Effects in Resonantly Enhanced Tunneling
N. Lörch, F. V. Pepe, H. Lignier +8
We study the time evolution of ultra-cold atoms in an accelerated optical lattice. For a Bose- Einstein condensate with a narrow quasi-momentum distribution in a shallow optical la…
Quantum scaling laws in the onset of dynamical delocalization
Julien Chabé, Hans Lignier, Hugo L. D. De Souza Cavalcante +3
We study the destruction of dynamical localization, experimentally observed in an atomic realization of the kicked rotor, by a deterministic Hamiltonian perturbation, with a tempor…
Improving Raman velocimetry of laser-cooled cesium atoms by spin-polarization
Julien Chabé, Hans Lignier, Pascal Szriftgiser +1
We study the peformances of Raman velocimetry applied to laser-cooled, spin-polarized, cesium atoms. Atoms are optically pumped into the F=4, m=0 ground-state Zeeman sublevel, whic…
Quantum diffusion in the quasiperiodic kicked rotor
Hans Lignier, Jean Claude Garreau, Pascal Szriftgiser +1
We study the mechanisms responsible for quantum diffusion in the quasiperiodic kicked rotor. We report experimental measurements of the diffusion constant on the atomic version of…