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

• URL: http://arxiv.org/abs/2505.04771v2
• Date: Mon, 27 Oct 2025 08:58:07 GMT
• Title: Single-bounce quantum gravimeter to measure the free-fall of anti-hydrogen
• Authors: Joachim Guyomard, Pierre Cladé, Serge Reynaud,
• Abstract summary: 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.<n>This quantum gravimeter produces a simple and robust interference pattern which should allow to measure the free-fall acceleration of atoms.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: 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.

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