A5036421726- Cold Atom Physics and Bose-Einstein Condensates
- Advanced Frequency and Time Standards
- Atomic and Subatomic Physics Research
- Quantum, superfluid, helium dynamics
- Quantum Mechanics and Applications
- Quantum optics and atomic interactions
- Quantum Information and Cryptography
- Geophysics and Sensor Technology
- Spectroscopy and Laser Applications
- Strong Light-Matter Interactions
- Scientific Measurement and Uncertainty Evaluation
- Random lasers and scattering media
- Radioactive Decay and Measurement Techniques
- Atomic and Molecular Physics
- Laser Design and Applications
- Ion Transport and Channel Regulation
- Laser-induced spectroscopy and plasma
- Advanced Fiber Laser Technologies
- Geophysics and Gravity Measurements
- Experimental and Theoretical Physics Studies
- RNA and protein synthesis mechanisms
- Advanced Materials Characterization Techniques
- Photonic and Optical Devices
- Orbital Angular Momentum in Optics
- Cosmology and Gravitation Theories
Centre National de la Recherche Scientifique
2015-2024
Laboratoire Charles Fabry
2008-2024
Centrum Wiskunde & Informatica
2024
Eindhoven University of Technology
2022-2024
First Technical University
2024
Laboratoire Photonique, Numérique et Nanosciences
2015-2024
Laboratoire Collisions Agrégats Réactivité
2024
Université de Bordeaux
2013-2024
University of Amsterdam
2022-2024
QuSoft
2022-2024
We report the demonstration of a Sagnac-effect atom interferometer gyroscope which uses stimulated Raman transitions to coherently manipulate atomic wave packets. have measured Earth's rotation rate, and demonstrated short-term sensitivity rotations $2\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}8}(\mathrm{rad}/\mathrm{s})/\sqrt{\mathrm{Hz}}$.
We report the demonstration of an atom interferometer-based gravity gradiometer. The gradiometer uses stimulated two-photon Raman transitions to measure relative accelerations two ensembles laser cooled atoms. have used this instrument gradient Earth's gravitational field.
We have developed an atom interferometer providing a full inertial base. This device uses two counter-propagating cold-atom clouds that are launched in strongly curved parabolic trajectories. Three single Raman beam pairs, pulsed time, successively applied three orthogonal directions leading to the measurement of axis rotation and acceleration. In this purpose, we introduce new gyroscope using butterfly geometry. discuss present sensitivity possible improvements.
Inertial sensors relying on atom interferometry offer a breakthrough advance in variety of applications, such as inertial navigation, gravimetry or ground- and space-based tests fundamental physics. These instruments require quiet environment to reach their performance using them outside the laboratory remains challenge. Here we report first operation an airborne matter-wave accelerometer set up aboard 0g plane operating during standard gravity (1g) microgravity (0g) phases flight. At 1g,...
Abstract We propose in this White Paper a concept for space experiment using cold atoms to search ultra-light dark matter, and detect gravitational waves the frequency range between most sensitive ranges of LISA terrestrial LIGO/Virgo/KAGRA/INDIGO experiments. This interdisciplinary experiment, called Atomic Experiment Dark Matter Gravity Exploration (AEDGE), will also complement other planned searches exploit synergies with wave detectors. give examples extended sensitivity matter offered...
Gravimetry is a well-established technique for the determination of sub-surface mass distribution needed in several fields geoscience, and various types gravimeters have been developed over last 50 years. Among them, quantum based on atom interferometry shown top-level performance terms sensitivity, long-term stability accuracy. Nevertheless, they remained confined to laboratories due their complex operation high sensitivity external environment. Here we report novel, transportable,...
We present an underground long baseline atom interferometer to study gravity at large scale. The hybrid atom-laser antenna will use several interferometers simultaneously interrogated by the resonant mode of optical cavity. instrument be a demonstrator for gravitational wave detection in frequency band (100 mHz - 1 Hz) not explored classical ground and space-based observatories, interesting potential astrophysical sources. In initial configuration, standard interferometry techniques adopted,...
The theory of general relativity describes macroscopic phenomena driven by the influence gravity while quantum mechanics brilliantly accounts for microscopic effects.Despite their tremendous individual success, a complete unification fundamental interactions is missing and remains one most challenging important quests in modern theoretical physics.The STE-QUEST satellite mission, proposed as medium-size mission within Cosmic Vision program European Space Agency (ESA), aims testing with high...
Quantum technology based on cold-atom interferometers is showing great promise for fields such as inertial sensing and fundamental physics. However, the best precision achievable Earth limited by free-fall time of atoms, their full potential can only be realized in Space where interrogation times many seconds will lead to unprecedented sensitivity. Various mission scenarios are presently being pursued which plan implement matter-wave sensors. Toward this goal, we realize first onboard...
This document presents a summary of the 2023 Terrestrial Very-Long-Baseline Atom Interferometry Workshop hosted by CERN. The workshop brought together experts from around world to discuss exciting developments in large-scale atom interferometer (AI) prototypes and their potential for detecting ultralight dark matter gravitational waves. primary objective was lay groundwork an international TVLBAI proto-collaboration. collaboration aims unite researchers different institutions strategize...
We observe the suppression of 1D transport an interacting elongated Bose-Einstein condensate in a random potential with standard deviation small compared to typical energy per atom, dominated by interaction energy. Numerical solutions Gross-Pitaevskii equation reproduce well our observations. propose scenario for disorder-induced trapping agreement
We show that the expansion of an initially confined interacting 1D Bose-Einstein condensate can exhibit Anderson localization in a weak random potential with correlation length ${\ensuremath{\sigma}}_{R}$. For speckle potentials Fourier transform function vanishes for momenta $k>2/{\ensuremath{\sigma}}_{R}$ so Lyapunov exponent Born approximation $k>1/{\ensuremath{\sigma}}_{R}$. Then, initial healing ${\ensuremath{\xi}}_{\mathrm{in}}>{\ensuremath{\sigma}}_{R}$ is exponential, and...
A curved mirror for atoms was made from an evanescent wave, formed by internal reflection of a quasiresonant laser beam at glass surface. cold cloud cesium dropped onto the and observed to rebound more than 8 times. The size reflectivity were studied, reasonable agreement with simple theory obtained. With 800 mW power 1 mm diameter, we up 73% returning after each bounce, losses being mostly during free flight between bounces.
We measure the axial momentum distribution of Bose-Einstein condensates with an aspect ratio 152 using Bragg spectroscopy. observe Lorentzian characteristic one-dimensional phase fluctuations. The temperature dependence width this provides a quantitative test quasicondensate theory. In addition, we condensate length consistent suppression density fluctuations, even when fluctuations are large.
We present a detailed analysis of the 1D expansion coherent interacting matterwave (a Bose-Einstein condensate) in presence disorder. A random potential is created via laser speckle patterns. It carefully calibrated and self-averaging properties our experimental system are discussed. observe suppression transport BEC potential. discuss scenario disorder-induced trapping taking into account radial extension 3D we compare results with theoretical predictions.
We propose an experiment that exploits the quantum interference between two noninteracting ensembles of spatially degenerate Bose-Einstein atoms to measure phase shifts atomic coherences at Heisenberg limit.
We propose a new detection strategy for gravitational waves (GWs) below few hertz based on correlated array of atom interferometers (AIs). Our proposal allows us to reduce the Newtonian noise (NN), which limits all ground GW detectors hertz, including previous interferometry-based concepts. Using an long baseline AI gradiometers yields several estimations NN, whose effect can thus be reduced via statistical averaging. Considering km current optical detectors, NN rejection factor 2 could...
We study a space-based gravity gradiometer based on cold atom interferometry and its potential for the Earth's gravitational field mapping. The instrument architecture has been proposed in [Carraz et al., Microgravity Science Technology 26, 139 (2014)] enables high-sensitivity measurements of gradients by using interferometers differential accelerometer configuration. present design including subsystems analyze mission scenario, which we derive expected performances, requirements sensor key...