Joachim Guyomard | Searcharxiv

arXiv2025

Image Theory for the Single Bounce Quantum Gravimeter

We develop an image theory for the recently proposed single-bounce quantum gravimeter. Free fall and quantum bounce of a matter wave-packet are described through decompositions over a basis of continuous energies. This leads to a much clearer interpretation of the origin of quantum interferences, associated to semi-classical estimations. We then give new tools to explore the space of parameters, and discuss the expected accuracy of the free-fall acceleration measurement.

quant-ph↗

arXiv2025

Single-bounce quantum gravimeter to measure the free-fall of anti-hydrogen

We propose an innovative concept for a quantum gravimeter, where atoms prepared in a Heisenberg-limited state perform a single bounce on a mirror followed by a free fall. This quantum gravimeter produces a simple and robust interference pattern which should allow to measure the free-fall acceleration of atoms. We estimate the expected accuracy of the measurement in the GBAR experiment, which aims at testing the equivalence principle on anti-hydrogen at CERN antimatter facilities. Using simulations and estimation techniques based on Cramer-Rao law and Fisher information, we show that the new quantum sensor improves the expected accuracy of the measurement. The proposal opens the door to free fall measurements on rare or exotic atomic species, especially in situations where experimental time or detection events are limited by intrinsic physical reasons.

quant-ph↗