SAMOP 2021 – wissenschaftliches Programm
SYAI 1.1: Hauptvortrag
Montag, 20. September 2021, 14:00–14:30, Audimax
Atom interferometry and its applications for gravity sensing — •Franck Pereira dos Santos, Luc Absil, Yann Balland, Sébastien Merlet, Maxime Pesche, Raphaël Piccon, and Sumit Sarkar — LNE-SYRTE, Observatoire de Paris, Université PSL, CNRS, Sorbonne Université, 61 avenue de l’Observatoire, 75014 Paris, France
The measurement of gravity, gravimetry, or its gradients, gradiometry, allows for static and dynamical studies of mass distributions, from local to global scales. Applications of gravimetry cover many disciplinary fields, such as geophysics, natural resources exploration, hydrology, geodesy, inertial navigation, fundamental physics and fundamental metrology.
Gravity measurements are performed with different kinds of relative and absolute sensors, which measure the gravity acceleration g and its variations, or its gradients. Among these, quantum gravity sensors, based on cold atom interferometry techniques, reach excellent sensitivities and accuracies, and outperform in many respects current state of the art commercially available technologies.
In my talk, I will review state of the art quantum sensors, and discuss their limits in performances, both in terms of stability and accuracy. I will discuss solutions currently explored to overcome these limits, such as based on the use of ultracold atom sources and large momentum transfer beamsplitters, as well as some of their present and future applications.