Rabi-Lorentzian profile of an atomic resonance obtained with Gaussian beams.
We demonstrate that the interaction between atoms and a Gaussian beam changes the Lorentzian resonance into a so-called Rabi-Lorentzian resonance profile. The existence of such profiles is experimentally evidenced in a dark resonance situation for metastable (4) He, in the absence of any external perturbation. A topological mechanism is shown theoretically to account for the measured profiles. We observe a 3% systematic residual with respect to a pure Lorentzian profile, which could play a role in the search of high precision in the measurement of fundamental constants.
Gilles
H
H
Cheron
B
B
Emile
O
O
Bretenaker
F
F
Le Floch
A
A