A5062120489- Cold Atom Physics and Bose-Einstein Condensates
- Advanced Frequency and Time Standards
- Atomic and Subatomic Physics Research
- Geophysics and Gravity Measurements
- Geophysics and Sensor Technology
- GNSS positioning and interference
- Inertial Sensor and Navigation
- Ionosphere and magnetosphere dynamics
- Radioactive Decay and Measurement Techniques
- Quantum Mechanics and Applications
- Scientific Measurement and Uncertainty Evaluation
- Quantum, superfluid, helium dynamics
- Advanced Materials Characterization Techniques
- Atmospheric Ozone and Climate
- Atomic and Molecular Physics
- Dust and Plasma Wave Phenomena
- Advanced Chemical Physics Studies
- Mechanical and Optical Resonators
- Planetary Science and Exploration
- Laser-induced spectroscopy and plasma
- Hemodynamic Monitoring and Therapy
- Spectroscopy and Laser Applications
- Advanced Fiber Optic Sensors
- Geophysical and Geoelectrical Methods
- Computational Physics and Python Applications
Office National d'Études et de Recherches Aérospatiales
2012-2024
Université Paris-Saclay
2016-2024
McPhy Energy (France)
2024
Conservatoire National des Arts et Métiers
2022
Laboratoire Aimé Cotton
2004-2014
Laboratoire d'Optique Appliquée
2013
Laboratoire Leprince-Ringuet
2007-2009
Laboratoire Kastler Brossel
2007
Institut Francilien de Recherche sur les Atomes Froids
2007
Centre National de la Recherche Scientifique
2004-2006
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 Measuring gravity from an aircraft or a ship is essential in geodesy, geophysics, mineral and hydrocarbon exploration, navigation. Today, only relative sensors are available for onboard gravimetry. This major drawback because of the calibration drift estimation procedures which lead to important operational constraints. Atom interferometry promising technology obtain absolute gravimeter. But, despite high performances obtained static condition, no precise measurements were reported...
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...
We report the realization of a matter-wave interferometer based on Raman transitions which simultaneously interrogates two different atomic species (${}^{87}$Rb and ${}^{85}$Rb). The simultaneous aspect our experiment presents encouraging preliminary results for future dual-species atom interferometry projects seems very promising by taking advantage differential acceleration measurement. Indeed, resolution accelerometer remains lower than...
Cold inelastic collisions between confined cesium (Cs) atoms and Cs2 molecules are investigated inside a CO2 laser dipole trap. Inelastic atom-molecule can be observed measured with rate coefficient of approximately 2.6 x 10(-11) cm3 s(-1), mainly independent the molecular rovibrational state populated. Lifetimes purely atomic samples essentially limited by rest gas collisions. The pure trap lifetime ranges 0.3-1 s, 4 times smaller than one, as is also in magnetic We give an estimation...
We present a local measurement of gravity combining Bloch oscillations and atom interferometry. With falling distance 0.8 mm, we achieve sensitivity 2x10-7 g with an integration time 300 s. No bias associated the has been measured. A contrast decay observed attributed to spatial quality laser beams. simple experimental configuration adopted where single retro-reflected beam is performing atoms launch, stimulated Raman transitions oscillations. The combination interferometry can thus be...
We present a cold atom gravimeter dedicated to field applications. Despite the compactness of our gravimeter, we obtain performances (sensitivity 42 μGal/Hz1/2, accuracy 25 μGal) close best gravimeters. report gravity measurements in an elevator which led us determination Earth's gradient with precision 4E. These non-laboratory environment demonstrate that technology is enough compact, reliable, and robust for Finally, moving open way absolute aircraft or boat.
We report an airborne gravity survey with absolute gravimeter based on atom interferometry and two relative gravimeters: a classical LaCoste\&Romberg (L\&R) novel iMAR strap-down Inertial Measurement Unit (IMU). estimated measurement errors for the quantum ranging from 0.6 to 1.3 mGal depending flight conditions filtering used. Similar are obtained strapdown but long term stability is five times worse. The traditional L\&R platform shows larger (3 - 4 mGal). Airborne measurements have been...
Recent developments in quantum technology have resulted a new generation of sensors for measuring inertial quantities, such as acceleration and rotation. These can exhibit unprecedented sensitivity accuracy when operated space, where the free-fall interrogation time be extended at will environment noise is minimal. European laboratories played leading role this field by developing concepts tools to operate these relevant environment, parabolic flights, towers, or sounding rockets. With...
Dense samples of cold Rydberg atoms have previously been observed to spontaneously evolve a plasma, despite the fact that each atom may be bound by as much $100\phantom{\rule{0.3em}{0ex}}{\mathrm{cm}}^{\ensuremath{-}1}$. Initially, ionization is caused blackbody photoionization and Rydberg-Rydberg collisions. After first electrons leave interaction region, net positive charge traps subsequent electrons. As result, rapid starts occur after...
The use of Raman laser generated by modulation for light-pulse atom interferometer allows to have a system more compact and robust. However, the additional frequencies can perturb interferometer. In this article, we present precise calculation phase shift induced frequencies. model is validated comparison with experimental measurements on an gravimeter. uncertainty determination limits accuracy our gravimeter at 8.10^-8 m/s^2. We show that it possible reduce considerably inaccuracy better...
We present a compact and stable dual-wavelength laser source for onboard atom interferometry with two different atomic species. It is based on frequency-doubled telecom lasers locked femtosecond optical frequency comb. take advantage of the maturity fiber technology to reduce number free-space components which are intrinsically less stable, make setup immune vibrations thermal fluctuations. The provides agility phase stability required can easily be adapted other cold experiments. have shown...
We present here the performance of a simultaneous dual-species matter-wave accelerometer for measuring differential acceleration between two different atomic species ($^{87}\mathrm{Rb}$ and $^{85}\mathrm{Rb}$). study expression extraction phase from interferometer output. The reaches short-term sensitivity $1.23\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}7}g/\sqrt{\mathrm{Hz}}$ limited by detection noise resolution $2\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}9}g$ after...
Long term observation of temporal Earth's gravity field with enhanced and spatial resolution is a major objective for future satellite missions. Improving the performance accelerometers present in such missions one main path to explore. In this context, we propose study an original concept hybrid accelerometer associating state-of-the-art electrostatic (EA) promising quantum sensor based on cold atom interferometry. To assess potential instrument, numerical simulations have been performed...
Abstract. We report on the availability of data from an airborne gravity campaign in Iceland and Greenland conducted during June July 2023. The dataset includes observations a platform-stabilised gravimeter based cold-atom quantum technology strapdown classical technology. are available at three different levels processing, making them relevant to users interested working with “quantum” “hybrid” as well geophysical studies. paper describes processing applied derive various presents...
Since the years 2000, three space missions, CHAMP, GRACE, and GOCE, have led us to consider Earth's gravitational field its measurement in a new light, using dedicated sensors adequate data processing, revealing changes as true signal rather than disturbing terms addition geostatic reference field. Besides possibilities offered by technologies for development of inertial sensors, environment course involves special constraints, but also allows possibility specific optimization concepts...
Atom interferometry using stimulated Raman transitions in a retroreflected configuration is the first choice high precision measurements because it provides low phase noise, quality wavefront and simple experimental setup. However, cannot be used for atoms at zero velocity two pairs of lasers are simultaneously resonant. Here we report method which allows to lift this degeneracy by frequency chirp on lasers. Using technique, realize Mach-Zehnder atom interferometer hybridized with force...
Coupling by the resonant dipole-dipole energy transfer between cold cesium Rydberg atoms is investigated using time-resolved narrow-band deexcitation spectroscopy. This technique combines advantage of efficient excitation with high-resolution spectroscopy at variable interaction times. Dipole-dipole observed spectroscopically as avoided level crossing. The coherent character process linked to back and forth in $np+np\ensuremath{\longleftrightarrow}ns+(n+1)s$ reaction. Decoherence ensemble...