07 Janvier – Thesis defense - Romain Arguel

10 h Amphi - Institut d'optique d'Aquitaine (Talence)

Interféromètre à ondes de matière ultra-froides pour le test du principe d'équivalence faible en micropesanteur.

Over the past decades, major leaps forward have been made in trapping and cooling atoms by optical methods. These new techniques paved the way to high-precision metrology in many applications, going from geodesy to inertial navigation, not forgetting fundamental physics. This work has been conducted in the framework of the ICE experiment, aiming to develop a bi-spescies atom accelerometer ($^{87}$Rb et $^{39}$K), dedicated to the test of the weak equivalence principle. In order to get rid of limitations related to atoms free falling in the experimental setup, this instrument has been designed to operate in a microgravity environment, making it a key technological demonstrator for future space applications. The weightlessness regime is concretely accessed by means of two complementary platforms, namely the Novespace 0G-aircraft and an Einstein elevator installed in the laboratory. The realization of long interrogation time interferometer (2$T$=200 ms) and progress which have been made in terms of atomic sources coherence give a glimpse, in the medium term, to a high sensitivity test of the Eötvös parameter with ultra-cold matter waves in microgravity.

Event localization