A5089056246- Cold Atom Physics and Bose-Einstein Condensates
- Advanced Frequency and Time Standards
- Atomic and Subatomic Physics Research
- Geophysics and Sensor Technology
- Spectroscopy and Laser Applications
- Pulsars and Gravitational Waves Research
- Quantum optics and atomic interactions
- Parallel Computing and Optimization Techniques
- Particle Detector Development and Performance
- Dark Matter and Cosmic Phenomena
- Geophysics and Gravity Measurements
- Atmospheric Ozone and Climate
- Quantum, superfluid, helium dynamics
- Quantum Information and Cryptography
- Cosmology and Gravitation Theories
- Distributed and Parallel Computing Systems
Laboratoire Photonique, Numérique et Nanosciences
2019-2022
Centre National de la Recherche Scientifique
2020-2022
University of Southampton
2020
Université de Bordeaux
2020
Peking University
2016-2017
Abstract We describe the realization and characterization of a compact, autonomous fiber laser system that produces optical frequencies required for cooling, trapping, manipulation, detection 87 Rb atoms - typical atomic species emerging quantum technologies. This device, customized from Muquans company, is designed use in challenging operating environment Laboratoire Souterrain à Bas Bruit (LSBB) France, where new large scale atom interferometer being constructed underground MIGA antenna....
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 detection bandwidth low frequency. The scientific potential of multi-frequency GW astronomy enormous as it would enable obtain a more complete picture cosmic events and mechanisms. This unique entirely new opportunity future astronomy, success which depends upon decisions being made on existing infrastructures. prospect combining...
We present a novel atom interferometer configuration that combines large momentum transfer with the enhancement of an optical resonator for purpose measuring gravitational strain in horizontal directions. Using Bragg diffraction and taking advantage gain provided by resonator, we achieve up to $8\ensuremath{\hbar}k$ mW level power cm-sized resonating waist. Importantly, our experiment uses original design allows beam waist eliminates need trap atoms cavity modes. demonstrate inertial...
Fluctuations of the earth's gravity field are a major noise source for ground-based experiments investigating general relativity phenomena such as Gravitational Waves (GWs). Mass density variations caused by local seismic or atmospheric perturbations determine spurious differential displacements free falling test masses, what is called Gravity Gradient Noise (GGN); it mimics GW effects. This GGN expected to become dominant in infrasound domain and must be tackled future realization...
Experiments in Atomic, Molecular, and Optical (AMO) physics require precise accurate control of digital, analog, radio frequency (RF) signals. We present hardware based on a field programmable gate array core that drives various modules via simple interface bus. The system supports an operating 10 MHz memory depth 8 M (223) instructions, both easily scalable. Successive experimental sequences can be stacked with no dead time synchronized external events at any instructions. Two or more units...
Abstract The Matter-wave laser Interferometric Gravitation Antenna (MIGA) is an underground instrument using cold-atom interferometry to perform precision measurements of gravity gradients and strains. Following its installation at the low noise laboratory LSBB in South-East France, it will serve as a prototype for gravitational wave detectors with horizontal baseline 150 meters. Three spatially separated interferometers be driven by two common counter-propagating lasers measurement gradient...
We proposed the European Laboratory for Gravitation and Atom-interferometric Research (ELGAR), an array of atom gradiometers aimed at studying space-time gravitation with primary goal observing gravitational waves (GWs) in infrasound band a peak strain sensitivity $3.3 \times 10^{-22}/\sqrt{\text{Hz}}$ 1.7 Hz. In this paper we detail main technological bricks large scale detector emphasis research pathways to be conducted its realization. discuss site options, optics, source requirements...
We present a novel atom interferometer configuration that combines large momentum transfer with the enhancement of an optical resonator for purpose measuring gravitational strain in horizontal directions. Using Bragg diffraction and taking advantage gain provided by resonator, we achieve up to $8\hbar k$ mW level power cm-sized resonating waist. Importantly, our experiment uses original design allows beam waist eliminates need trap atoms cavity modes. demonstrate inertial sensitivity...
Located far from anthropical disturbances and with low seismic magnetic background noise profiles, the LSBB facility is ideal location for a new hybrid detector study of space-time strain. The MIGA infrastructure [1], utilizes an array atom interferometers manipulated by same beam, resonant optical field 150 m long cavity. constitutes method geophysics, characterization spatial temporal variations local gravity, demonstrator future decihertz gravitational wave observation. Such requires...
We describe the realization and characterization of a compact, autonomous fiber laser system that produces optical frequencies required for cooling, trapping, manipulation, detection $^{87}$Rb atoms - typical atomic species emerging quantum technologies. This device, customized from Muquans company, is designed use in challenging operating environment Laboratoire Souterrain \`{a} Bas Bruit (LSBB) France, where new large scale atom interferometer being constructed underground MIGA antenna....
Overlaying commensurate optical lattices with various configurations called superlattices can lead to exotic lattice topologies and, in turn, a discovery of novel physics. In this study, by overlapping the maxima lattices, new isolated structure is created, while interference minima generate "sublattice" patterns. Three different kinds primitive are used demonstrate square, triangular, and hexagonal structures two-dimensional superlattice, patterns which be manipulated dynamically tuning...
In atomic dynamics, oscillation along different axes can be studied separately in the harmonic trap. When trap is not harmonic, motion directions may couple together. this work, we observe a two-dimensional by exciting atoms one direction, where are transferred to an anharmonic region. Theoretical calculations coincident experimental results. These oscillations two dimensions only used measure parameters but also have potential applications interferometry and precise measurements.
We report the realization of a large scale gravity antenna based on matter-wave interferometry, MIGA project. This experiment consists in an array cold Rb sources correlated by 150 m long optical cavity. is construction at LSBB underground laboratory, site that benefits from low background noise and ideal premise to carry out precision measurements. The facility will be demonstrator for new generation GW detector atom interferometry could open infrasound window observation GWs. describe here...
The Matter-wave laser Interferometric Gravitation Antenna (MIGA) is an underground instrument using cold-atom interferometry to perform precision measurements of gravity gradients and strains. Following its installation at the low noise laboratory LSBB in South-East France, it will serve as a prototype for gravitational wave detectors with horizontal baseline 150 meters. Three spatially separated interferometers be driven by two common counter-propagating lasers measurement gradient along...