[Mesures de champs électriques parasites à courte distance à l’aide d’un capteur quantique de force]
We use a quantum sensor based on trapped atom interferometry, and designed for probing short range atom-surface interactions, to characterize parasitic electric fields produced by adsorbed atoms or surface charges on a dielectric mirror. Applying controlled external fields with in-situ electrodes allows measuring electric field gradients with a relative uncertainty of order of 1% via variations of the force induced onto the atoms. More, our sensor can also be configured as a trapped microwave clock, allowing for direct measurements of the electric field amplitude via the Stark shift of the hyperfine transition frequency. Such measurements of the electric field amplitudes and gradients as a function of the atom-surface distance can be used to construct a model for the spatial distribution of the atoms adsorbed onto the surface of the mirror, and to accurately correct local force measurements, such as related to the Casimir–Polder interaction, from the detrimental impact of adsorbed atoms or stray charges.
Nous utilisons un capteur quantique basé sur l’interférométrie à atomes piégés, et conçu pour sonder les interactions atomes-surface à courte distance, pour caractériser les champs électriques parasites produits par des atomes adsorbés ou des charges de surface sur un miroir diélectrique. L’application à l’aide d’électrodes in situ de champs externes contrôlés permet de mesurer les gradients de champ électrique avec une incertitude relative de l’ordre de 1 % grâce aux variations de la force induite sur les atomes. En outre, notre capteur peut également être configuré comme une horloge micro-onde piégée, ce qui permet de mesurer directement l’amplitude du champ électrique par le biais du décalage Stark de la fréquence de la transition hyperfine. Ces mesures des amplitudes et des gradients du champ électrique en fonction de la distance atomes-surface peuvent être utilisées pour construire un modèle de distribution spatiale des atomes adsorbés sur la surface du miroir et pour corriger avec précision les mesures de force locale, telles que celles liées à l’interaction Casimir–Polder, de l’impact préjudiciable d’atomes adsorbés ou de charges parasites.
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Mots-clés : Capteurs quantiques, Forces à faible distance, Champs électriques
Yann Balland 1 ; Franck Pereira dos Santos 1
CC-BY 4.0
@article{CRPHYS_2025__26_G1_631_0,
author = {Yann Balland and Franck Pereira dos Santos},
title = {Measuring short range stray electric fields with a force quantum sensor},
journal = {Comptes Rendus. Physique},
pages = {631--639},
year = {2025},
publisher = {Acad\'emie des sciences, Paris},
volume = {26},
doi = {10.5802/crphys.264},
language = {en},
}
TY - JOUR AU - Yann Balland AU - Franck Pereira dos Santos TI - Measuring short range stray electric fields with a force quantum sensor JO - Comptes Rendus. Physique PY - 2025 SP - 631 EP - 639 VL - 26 PB - Académie des sciences, Paris DO - 10.5802/crphys.264 LA - en ID - CRPHYS_2025__26_G1_631_0 ER -
Yann Balland; Franck Pereira dos Santos. Measuring short range stray electric fields with a force quantum sensor. Comptes Rendus. Physique, Volume 26 (2025), pp. 631-639. doi: 10.5802/crphys.264
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