A5014082583- Cold Atom Physics and Bose-Einstein Condensates
- Advanced Frequency and Time Standards
- Atomic and Subatomic Physics Research
- Quantum optics and atomic interactions
- Geophysics and Sensor Technology
- Quantum Mechanics and Applications
- Quantum Information and Cryptography
- Mechanical and Optical Resonators
- Advanced Materials Characterization Techniques
- Quantum and electron transport phenomena
- Semiconductor Lasers and Optical Devices
- Advanced Fiber Laser Technologies
- Force Microscopy Techniques and Applications
- Experimental and Theoretical Physics Studies
- Dark Matter and Cosmic Phenomena
- Laser Design and Applications
- Scientific Measurement and Uncertainty Evaluation
- Spectroscopy and Laser Applications
- Molecular Junctions and Nanostructures
- Random lasers and scattering media
- Molecular spectroscopy and chirality
- Particle accelerators and beam dynamics
- Energy and Environment Impacts
- Quantum and Classical Electrodynamics
- Electrochemical Analysis and Applications
Laboratoire Collisions Agrégats Réactivité
2014-2025
Université Toulouse III - Paul Sabatier
2013-2024
Centre National de la Recherche Scientifique
2005-2024
Université de Toulouse
2017-2023
Institut de Recherche sur les Systèmes Atomiques et Moléculaires Complexes
2012-2020
Durham University
2009-2014
Newcastle University
2014
University of Rochester
2010-2011
Systèmes de Référence Temps-Espace
2005-2010
Deleted Institution
2008-2010
By coupling a probe transition to Rydberg state using electromagnetically induced transparency (EIT) we map the strong dipole-dipole interactions onto an optical field. We characterize resulting cooperative nonlinearity as function of strength and density. demonstrate good quantitative agreement between experiment $N$-atom model for $N=3$ atoms per blockade sphere $n=60$ state. The measured linewidth EIT resonance places upper limit on dephasing rate spheres $<110\text{ }\text{ }\mathrm{kHz}$.
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.
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...
We use a microwave field to control the quantum state of optical photons stored in cold atomic cloud. The are highly excited collective states (Rydberg polaritons) enabling both fast qubit rotations and photon-photon interactions. Through read-out these pseudospin it is shown that modifies long-range interactions between polaritons. This technique provides powerful interface domains, with applications simulations spin liquids, metrology networks.
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 present here an analysis of the sensitivity a time-domain atomic interferometer to phase noise lasers used manipulate wave-packets. The function is calculated in case three pulse Mach-Zehnder interferometer, which configuration two inertial sensors we are building at BNM-SYRTE. successfully compare this calculation experimental measurements. limited by lasers, as well residual vibrations. evaluate performance that could be obtained with state art quartz oscillators, impact phase-lock...
We present the full evaluation of a cold atom gyroscope based on interferometry. have performed extensive studies to determine systematic errors, scale factor and sensitivity. demonstrate that acceleration noise can be efficiently removed from rotation signal allowing reach fundamental limit quantum projection for short term measurements. The technical limits long sensitivity accuracy been identified, clearing way next generations ultra-sensitive gyroscopes.
In this Letter, we demonstrate a new scheme for Raman transitions which realize symmetric momentum-space splitting of $4\ensuremath{\hbar}k$, deflecting the atomic wave packets into same internal state. Combining advantages and Bragg diffraction, achieve three pulse state labeled an interferometer, intrinsically insensitive to main systematics applicable all kinds sources. This can be extended $4N\ensuremath{\hbar}k$ momentum transfer by multipulse sequence is implemented on...
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...
We study the influence of off-resonant two-photon transitions on high-precision measurements with atom interferometers based stimulated Raman transitions. These resonances induce a light shift resonant condition. The impact this effect is investigated in two highly sensitive experiments using gravimeter and gyroscope-accelerometer. show that it can lead to significant systematic phase shifts, which have be taken into account order achieve best performances terms accuracy stability.
We report an experimental test of the topological phase predicted by He and McKellar in 1993 Wilkens 1994: this phase, which appears when electric dipole propagates a magnetic field, is connected to Aharonov-Casher effect electric-magnetic duality. The He-McKellar-Wilkens quite small, at most 27 mrad our experiment, experiment requires high sensitivity atom interferometer with spatially separated arms as well symmetry reversals such direction fields. measured value differs 31% from its...
In this paper, we consider the effects of strong dipole-dipole interactions on three-level interference phenomena such as coherent population trapping and electromagnetically induced transparency. Experiments are performed laser cooled rubidium atoms results compared to a many-body theory based either reduced density matrix expansion or Monte Carlo simulations rate equations. We show that these approaches permit quantitative predictions experimentally observed excitation transmission...
We study electromagnetically induced transparency (EIT) in the 5s$\rightarrow$5p$\rightarrow$46s ladder system of a cold $^{87}$Rb gas. show that resonant microwave coupling between 46s and 45p states leads to an Autler-Townes splitting EIT resonance. This can be employed vary group index by $\pm 10^5$ allowing independent control propagation dark state polaritons. also demonstrate dressing enhanced interaction effects. In particular, we present evidence for $1/R^3$ energy shift Rydberg...
In this Letter, we report a measurement of the He-McKellar-Wilkens (HMW) topological phase by atom interferometry. The experiment is done with our lithium interferometer, and in order to suppress stray effects present first experiment, use optical pumping (7)Li atoms their F=2, m(F)=+2 (or -2) ground state sublevel. these conditions, measured shift sum HMW Aharonov-Casher phase, which are separated due different m(F) dependence. has been for beam velocities results very good agreement...
A microwave field is used to control the interaction between pairs of optical photons stored in highly excited collective states (Rydberg polaritons). We show that strong dipole-dipole interactions induced by destroy coherence polariton modes with more than one Rydberg excitation. Consequently single-polariton modes, which correspond single photons, are preferentially retrieved from sample. Measurements photon statistics light also reveal non-trivial propagation dynamics interacting polaritons.
We report here on the realization of light-pulse atom interferometers with large-momentum-transfer optics based a sequence Bragg transitions. demonstrate momentum splitting up to 200 photon recoils in an ultracold interferometer. highlight new mechanism destructive interference losses leading sizable efficiency enhancement beam splitters. perform comprehensive study parasitic due inherent multiport feature quasi-Bragg pulses. Finally, we experimentally verify phase shift and characterize...
The effective control of atomic coherence with cold atoms has made atom interferometry an essential tool for quantum sensors and precision measurements. performance these interferometers is closely related to the operation large wave packet separations. We present here a novel approach beam splitters based on stroboscopic stabilization states in accelerated optical lattice. corresponding Floquet state generated by optimal protocols. In this way, we demonstrate unprecedented Large Momentum...
The authors present a joint experimental and theoretical study of the diffraction rubidium Bose-Einstein condensate by an optical lattice in quasi-Bragg regime. results focus on losses multiport features, which could guide future studies atom interferometry.
We present a design strategy for grating magneto-optical traps (GMOTs). It takes the three most relevant optical properties laser cooling (radiation pressure balance, specular reflection cancellation, and diffracted polarization) to build scalar figure of merit. use rigorous coupled wave analysis (RCWA) simulation find geometry that maximizes this also introduce criterion into account robustness manufacturing processes select is reliable manufacture. Finally, we demonstrate fabricated...
We report the preparation of Bose-Einstein condensates (BECs) by integrating laser cooling with a grating magneto-optical trap (GMOT) and forced evaporation in magnetic on single chip. This new approach allowed us to produce $6 \times 10^4$ atom condensate rubidium-87 atoms beam. Our results represent significant advance robustness reliability cold atom-based inertial sensors, especially for applications demanding field environments.
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...