Publications (10)
Simultaneous accurate determination of both gravity and its vertical gradient
R. Caldani, K Weng, S. Merlet +1
We present a method for the accurate measurements of both the gravity acceleration and its vertical gradient using a dual atom interferometer, in principle free from any uncertaint…
Calibration of a superconducting gravimeter with an absolute atom gravimeter
S. Merlet, P. Gillot, B. Cheng +4
We present a 27-days long common view measurement of an absolute cold atom gravimeter (CAG) and a relative iGrav superconducting gravimeter, which we use to calibrate the iGrav sca…
Technologies for the ELGAR large scale atom interferometer array
B. Canuel, S. Abend, P. Amaro-Seoane +56
We proposed the European Laboratory for Gravitation and Atom-interferometric Research (ELGAR), an array of atom gradiometers aimed at studying space-time and gravitation with the p…
Differential phase extraction in dual interferometers exploiting the correlation between classical and quantum sensors
M. Langlois, R. Caldani, A. Trimeche +2
We perform the experimental demonstration of the method proposed in [Phys. Rev. A 91, 063615 (2015)] to extract the differential phase in dual atom interferometers. From a single m…
Comparison between two mobile absolute gravimeters: optical versus atomic interferometers
S. Merlet, Q. Bodart, N. Malossi +4
We report a comparison between two absolute gravimeters: the LNE-SYRTE cold atoms gravimeter and FG5#220 of Leibniz Universität of Hannover. They rely on different principles of o…
ELGAR -- a European Laboratory for Gravitation and Atom-interferometric Research
B. Canuel, S. Abend, P. Amaro-Seoane +55
Gravitational Waves (GWs) were observed for the first time in 2015, one century after Einstein predicted their existence. There is now growing interest to extend the detection band…
Influence of chirping the Raman lasers in an atom gravimeter: phase shifts due to the Raman light shift and to the finite speed of light
B. Cheng, P. Gillot, S. Merlet +1
We present here an analysis of the influence of the frequency dependence of the Raman laser light shifts on the phase of a Raman-type atom gravimeter. Frequency chirps are applied…
Comparison of 3 absolute gravimeters based on different methods for the e-MASS project
A. Louchet-Chauvet, S. Merlet, Q. Bodart +5
We report on the comparison between three absolute gravimeters that took place in April 2010 at Laboratoire National de Métrologie et d'Essais. The three instruments (FG5#209 from…
Improving the accuracy of atom interferometers with ultracold sources
R Karcher, A Imanaliev, S. Merlet +1
We report on the implementation of ultracold atoms as a source in a state of the art atom gravimeter. We perform gravity measurements with 10 nm/s 2 statistical uncertainties in a…
Perturbations of the local gravity field due to mass distribution on precise measuring instruments: a numerical method applied to a cold atom gravimeter
G. D'Agostino, S. Merlet, A. Landragin +1
We present a numerical method, based on a FEM simulation, for the determination of the gravitational field generated by massive objects, whatever geometry and space mass density th…