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Dr. Sophie Pelisson

SYRTE, Paris

Tuesday, March 5th, 2013 at 04:00:00 PM  

Conference room Querzoli - LENS - via Nello Carrara 1 - Sesto Fiorentino (Florence)

Published on-line at 07:26:42 PM on Tuesday, February 26th, 2013

Theory of trapped atoms in proximity of a surface: application to the measurement of short-range

Theoretical modelling of the FORCA-G experiment on deviations from Newton's law at very short distances.

The experiment FORCA-G, currently in progress at SYRTE laboratory, is an atom interferometry experiment aiming at measuring short range interactions between an atom and a massive surface. Using cold atoms confined in a vertical standing wave close to a mirror, the experiment will allow to set constraints on a hypothetical deviation from Newton's law at very short distances (from 1 to 10 μm) predicted by a number of unification theories.

In addition, the interferometry method will result in a high precision measurement of the Casimir-Polder potential between the atoms and the surface. This potential arises from the interaction between the atom and the quantized electromagnetic field in the presence of the surface.

The work that I will present consist in a theoretical modelling of the experiment in order to predict the experimental signal and to optimize the interferometric scheme. Firstly, I will describe the pseudo eigenstates of the trap taking into account the specific boundary conditions and the short-range potential. Then I will study the stability of these atomic states in the trap and I will conclude with a complete simulation of the experimental scheme.

For further informations, please contact Dr. Augusto Smerzi.