Underground operation at best sensitivity of the mobile LNE-SYRTE cold atom gravimeter

Farah, Tristan; Guerlin, Christine; Landragin, Arnaud; Bouyer, Philippe; Gaffet, Stéphane; Santos, F. Pereira Dos; Merlet, Sébastien

doi:10.1134/s2075108714040051

Cited by 89 publications

(71 citation statements)

References 24 publications

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“…An alternative technique involves measuring the common phase and correcting for it. For the case of parasitic mirror vibrations, single-sensor interference fringes that are otherwise smeared by phase noise can be restored based on measurements from seismometers [66][67][68] or mechanical accelerometers [41,69,70]. Henceforth, we refer to this as the fringe reconstruction by accelerometer correlation (FRAC) method.…”

Section: Fringe Reconstruction By Accelerometer Correlation-the Diffementioning

confidence: 99%

Correlative methods for dual-species quantum tests of the weak equivalence principle

et al. 2015

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Matter-wave interferometers utilizing different isotopes or chemical elements intrinsically have different sensitivities, and the analysis tools available until now are insufficient for accurately estimating the atomic phase difference under many experimental conditions. In this work, we describe and demonstrate two new methods for extracting the differential phase between dual-species atom interferometers for precise tests of the weak equivalence principle (WEP). The first method is a generalized Bayesian analysis, which uses knowledge of the system noise to estimate the differential phase based on a statistical model. The second method utilizes a mechanical accelerometer to reconstruct single-sensor interference fringes based on measurements of the vibration-induced phase. An improved ellipse-fitting algorithm is also implemented as a third method for comparison. These analysis tools are investigated using both numerical simulations and experimental data from simultaneous 87 Rb and 39 K interferometers, and both new techniques are shown to produce bias-free estimates of the differential phase. We also report observations of phase correlations between atom interferometers composed of different chemical species. This correlation enables us to reject common-mode vibration noise by a factor of 730, and to make preliminary tests of the WEP with a sensitivity of 1.6 10 6 × − per measurement with an interrogation time of T = 10 ms. We study the level of vibration rejection by varying the temporal overlap between interferometers in a symmetric timing sequence. Finally, we discuss the limitations of the new analysis methods for future applications of differential atom interferometry.

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Section: Fringe Reconstruction By Accelerometer Correlation-the Diffementioning

confidence: 99%

Correlative methods for dual-species quantum tests of the weak equivalence principle

et al. 2015

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“…Notons que cette campagne de mesure nous a permis d'éprouver la sensibilité à court terme de l'instrument en environnement à bas bruit. Sans aucun système d'isolation des vibrations, le gravimètre CAG a atteint des sensibilités record de 1 μGal sur 100 s de mesure [49].…”

Section: Mobilitéunclassified

Détermination de l’accélération de la pesanteur pour la balance du watt du LNE

Merlet¹,

Gillot²,

Farah³

et al. 2015

R. franç. métrol.

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RésuméLe projet « balance du watt » propose de relier la définition du kilogramme à la constante de Planck. La pesée de la masse impliquée nécessite une détermination de l'accélération de la pesanteur g avec une exactitude meilleure que 10 −8 . Les travaux résumés dans cet article visent à réaliser cette détermination à l'aide d'un gravimètre atomique et d'un site gravimétrique dédié. MOTS CLÉS: GRAVIMÉTRIE, CARTOGRAPHIE GRAVIMÉTRIQUE, MODÉLISATION GRAVIMÉTRIQUE, INTERFÉROMÉTRIE ATOMIQUE, BALANCE DU WATT. AbstractThe "watt balance" project aims at linking the kilogram definition to the Planck constant. The weighing of the mass involved requires a determination of the acceleration g with an uncertainty better than 10 −8 . This work aims at determining g with an atomic gravimeter and a dedicated gravimetric site.

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“…In contrast with these experiments, MIGA will explore the use of AI techniques to build a largescale matter-wave sensor which will open new applications in geoscience and fundamental physics. In contrast to standard AI based sensors, commonly limited by laboratory vibrations transmitted to the free falling atoms through the interrogation lasers, MIGA will exploit the superb seismic environment of a low noise underground laboratory [11] and will use suspended cavity mirrors for the definition of the E3S Web of Conferences interrogation field. This will provide a real breakthrough in sensitivity for the MIGA applications and for the development of next generation AI sensors.…”

Section: Introductionmentioning

confidence: 99%

The matter-wave laser interferometer gravitation antenna (MIGA): New perspectives for fundamental physics and geosciences

Canuel

Amand

Bertoldi

et al. 2014

E3S Web of Conferences

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Abstract. We are building a hybrid detector of new concept that couples laser and matter-wave interferometry to study sub Hertz variations of the strain tensor of space-time and gravitation. Using a set of atomic interferometers simultaneously manipulated by the resonant optical field of a 200 m cavity, the MIGA instrument will allow the monitoring of the evolution of the gravitational field at unprecedented sensitivity, which will be exploited both for geophysical studies and for Gravitational Waves (GWs) detection. This new infrastructure will be embedded into the LSBB underground laboratory, ideally located away from major anthropogenic disturbances and benefitting from very low background noise.

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Underground operation at best sensitivity of the mobile LNE-SYRTE cold atom gravimeter

Cited by 89 publications

References 24 publications

Correlative methods for dual-species quantum tests of the weak equivalence principle

Correlative methods for dual-species quantum tests of the weak equivalence principle

Détermination de l’accélération de la pesanteur pour la balance du watt du LNE

The matter-wave laser interferometer gravitation antenna (MIGA): New perspectives for fundamental physics and geosciences

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