Andréa Bertoldi
A5052208419- Cold Atom Physics and Bose-Einstein Condensates
- Advanced Frequency and Time Standards
- Atomic and Subatomic Physics Research
- Quantum optics and atomic interactions
- Quantum Information and Cryptography
- Scientific Measurement and Uncertainty Evaluation
- Quantum Mechanics and Applications
- Pulsars and Gravitational Waves Research
- Geophysics and Sensor Technology
- Radioactive Decay and Measurement Techniques
- Advanced Fiber Laser Technologies
- Quantum, superfluid, helium dynamics
- Spectroscopy and Laser Applications
- Advanced Fiber Optic Sensors
- Seismic Imaging and Inversion Techniques
- Mechanical and Optical Resonators
- Seismic Waves and Analysis
- Advanced Materials Characterization Techniques
- Solid State Laser Technologies
- Magnetic Field Sensors Techniques
- Geophysics and Gravity Measurements
- Photonic Crystal and Fiber Optics
- Seismology and Earthquake Studies
- Dark Matter and Cosmic Phenomena
- Quantum and electron transport phenomena
Laboratoire Photonique, Numérique et Nanosciences
2014-2024
Centre National de la Recherche Scientifique
2014-2024
Institut d’Optique Graduate School
2014-2024
Université de Bordeaux
2013-2023
Nanyang Technological University
2022
Centre for Quantum Technologies
2022
National University of Singapore
2022
University of Southampton
2020
Medical Insurance Group Australia
2018
Laboratoire Charles Fabry
2008-2014
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 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...
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 a new measurement of the Newtonian gravitational constant G based on cold-atom interferometry. Freely falling samples laser-cooled rubidium atoms are used in gravity gradiometer to probe field generated by nearby source masses. In addition its potential sensitivity, this method is intriguing as explored quantum system. report value = 6.667 x 10(-11) m(3) kg(-1) s(-2), estimating statistical uncertainty +/-0.011 s(-2) and systematic +/-0.003 s(-2). The long-term stability...
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...
Abstract We summarise the discussions at a virtual Community Workshop on Cold Atoms in Space concerning status of cold atom technologies, prospective scientific and societal opportunities offered by their deployment space, developments needed before atoms could be operated space. The technologies discussed include atomic clocks, quantum gravimeters accelerometers, interferometers. Prospective applications metrology, geodesy measurement terrestrial mass change due to, e.g., climate change,...
Atom interferometers have been shown to be very stable and accurate sensors for acceleration rotation.In this paper we review the applications of atom interferometry gravity measurements, with a special emphasis on potential impact these techniques applied science fields.
We report on the all-optical production of Bose-Einstein condensates in microgravity using a combination grey molasses cooling, light-shift engineering and optical trapping painted potential. Forced evaporative cooling 3-m high Einstein elevator results $4\ifmmode\times\else\texttimes\fi{}{10}^{4}$ condensed atoms every 13.5 s, with temperature as low 35 nK. In this system, atomic cloud can expand weightlessness for up to 400 ms, paving way atom interferometry experiments extended...
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 demonstrate a method to measure the gravitational acceleration with dual cloud atom interferometer; use of simultaneous interferometers reduces effect seismic noise on gravity measurement. At same time, apparatus is capable accurate measurements vertical gradient. The ability determine and gradient simultaneously instrument opens interesting perspectives in geophysical applications.
Matter-wave interferometers utilizing different isotopes or chemical elements intrinsically have sensitivities, and the analysis tools available until now are insufficient for accurately estimating atomic phase difference under many experimental conditions. In this work, we describe demonstrate two new methods extracting differential between dual-species atom precise tests of weak equivalence principle. The first method is a generalized Bayesian analysis, which uses knowledge system noise to...
The sensitivity of an atomic interferometer increases when the phase evolution its quantum superposition state is measured over a longer interrogation interval. In practice, limit set by measurement process, which returns not phase, but projection in terms population difference on two energetic levels. interval relation can be inverted thus limited to $[-\pi/2,\pi/2]$; going beyond it introduces ambiguity read out, hence loss. Here, we extend unambiguous probe ensemble using coherence...
Abstract This article contains a summary of the White Paper submitted in 2019 to ESA Voyage 2050 process, which was subsequently published EPJ Quantum Technology (AEDGE Collaboration et al. Quant. Technol. 7 ,6 2020). We propose this concept for space experiment using cold atoms search ultra-light dark matter, and detect gravitational waves frequency range between most sensitive ranges LISA terrestrial LIGO/Virgo/KAGRA/INDIGO experiments. interdisciplinary experiment, called Atomic...
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...
We derive an expression for the phase shift of atom interferometer in a gravitational field taking into account both finite duration light pulses and effect small perturbing potential added to stronger uniform field, extending well-known results rectangular at most quadratic potentials. These refinements are necessary correct analysis present day high resolution interferometers.
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...
Abstract We present the scientific motivation for future space tests of equivalence principle, and in particular universality free fall, at 10 − 17 level or better. Two possible mission scenarios, one based on quantum technologies, other electrostatic accelerometers, that could reach goal are briefly discussed. This publication is a White Paper written context Voyage 2050 ESA Call Papers.
We demonstrate how to use feedback control the internal states of trapped coherent ensembles two-level atoms, and protect a superposition state against decoherence induced by collective noise. Our scheme is based on weak optical measurements with negligible backaction followed microwave manipulations. The efficiency system studied for simple binary noise model characterized in terms trade-off between information retrieval destructivity from probe. also correction more general types This...
We report on a novel experiment to generate non-classical atomic states via quantum non-demolition (QND) measurements cold samples prepared in high-finesse ring cavity. The heterodyne technique developed for QND detection exhibits an optical shot-noise limited behavior local oscillator power of few hundred μW, and bandwidth several GHz. This tool is used single pass follow non-destructively the internal state evolution sample when subjected Rabi oscillations or spin-echo interferometric sequence.