A5073227522- Cold Atom Physics and Bose-Einstein Condensates
- Advanced Frequency and Time Standards
- Quantum optics and atomic interactions
- Quantum, superfluid, helium dynamics
- Scientific Measurement and Uncertainty Evaluation
- Atomic and Subatomic Physics Research
- Quantum Information and Cryptography
- Atomic and Molecular Physics
- Advanced Chemical Physics Studies
- Quantum Mechanics and Applications
- Spectroscopy and Quantum Chemical Studies
- Geophysics and Sensor Technology
- Radioactive Decay and Measurement Techniques
- Advanced Fiber Laser Technologies
- Strong Light-Matter Interactions
- Spectroscopy and Laser Applications
- Advanced Materials Characterization Techniques
- Physics of Superconductivity and Magnetism
- Quantum and electron transport phenomena
- Particle accelerators and beam dynamics
- Muon and positron interactions and applications
- Quantum chaos and dynamical systems
- Cold Fusion and Nuclear Reactions
- Particle Detector Development and Performance
- Nuclear physics research studies
Laboratoire Aimé Cotton
2015-2025
Université Paris-Saclay
2016-2025
Université Paris-Sud
2012-2022
École Normale Supérieure Paris-Saclay
2015-2022
Centre National de la Recherche Scientifique
2012-2022
Czech Technical University in Prague
2022
University of Brescia
2022
Istituto Nazionale di Fisica Nucleare, Sezione di Pavia
2022
Warsaw University of Technology
2022
University of Latvia
2022
Quantum mechanical superexchange interactions form the basis of quantum magnetism in strongly correlated electronic media. We report on direct measurement with ultracold atoms optical lattices. After preparing a spin-mixture an antiferromagnetically ordered state, we measure coherent superexchange-mediated spin dynamics coupling energies from 5 Hz up to 1 kHz. By dynamically modifying potential bias between neighboring lattice sites, magnitude and sign interaction can be controlled, thus...
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,...
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...
Abstract Antihydrogen atoms with K or sub-K temperature are a powerful tool to precisely probe the validity of fundamental physics laws and design highly sensitive experiments needs antihydrogen controllable well defined conditions. We present here experimental results on production in pulsed mode which time when 90% produced is known an uncertainty ~250 ns. The source generated by charge-exchange reaction between Rydberg positronium atoms—produced via injection positron beam into...
We report on the observation of an interaction blockade effect for ultracold atoms in optical lattices, analogous to Coulomb observed mesoscopic solid state systems. When lattice sites are converted into biased double wells, we detect a discrete set steps well population increasing bias potentials. These correspond tunneling resonances where atom number each side barrier changes one by one. This allows us count and control within given well. By evaluating amplitude different plateaus, can...
We report on the observation of many-body spin dynamics interacting, one-dimensional (1D) ultracold bosonic gases with two states. By controlling nonlinear atomic interactions close to a Feshbach resonance we are able induce phase diffusive relative between components. monitor this dynamical evolution by Ramsey interferometry, supplemented novel, echo technique, which unveils role quantum fluctuations in 1D. find that time system is well described Luttinger liquid initially prepared...
We report on the controlled creation of a valence bond state delocalized effective-spin singlet and triplet dimers by means bichromatic optical superlattice. demonstrate coherent coupling between states show how superlattice can be employed to measure singlet-fraction employing spin blockade effect. Our method provides reliable way detect control nearest-neighbor correlations in many-body systems ultracold atoms. Being able these is an important ingredient study quantum magnetism lattices....
We measure the coherent scattering of low-intensity, near-resonant light by a cloud laser-cooled two-level rubidium atoms with size comparable to wavelength light. isolate atomic structure applying 300-G magnetic field. both temporal and steady-state optical response for various detunings laser atom numbers ranging from 5 100. compare our results microscopic coupled-dipole model multimode, paraxial Maxwell-Bloch model. In low-intensity regime, models are in excellent agreement, thus...
Cold Rydberg atoms subject to long-range dipole-dipole interactions represent a particularly interesting system for exploring few-body and probing the transition from 2-body physics many-body regime. In this work we report direct observation of resonant 4-body interaction. We exploit occurrence an accidental quasicoincidence Stark-tuned F\"orster process in cesium observe energy transfer requiring simultaneous interaction at least four neighboring atoms. These results are relevant...
We propose a scheme of fast three-qubit Toffoli quantum gate for ultracold neutral-atom qubits. The is based on Stark-tuned three-body F\"orster resonances, which we have observed in our recent experiment [D. B. Tretyakov et al., Phys. Rev. Lett. 119, 173402 (2017)]. resonance corresponds to transition when the three interacting atoms change their states simultaneously, and it occurs at different dc electric field with respect two-body resonance. A combined effect interactions external...
We propose a scheme for testing the weak equivalence principle (universality of free-fall (UFF)) using an atom-interferometric measurement local differential acceleration between two atomic species with large mass ratio as test masses. An apparatus in free fall can be used to track trajectories over distances. show how extracted from interferometric signal Bayesian statistical estimation, even case and laser wavelength difference. that this estimation method does not suffer noise platform...
Abstract Controlling the interactions between ultracold atoms is crucial for quantum simulation and computation purposes. Highly excited Rydberg are considered in this prospect their strong controllable known dipole-dipole case to induce non-radiative energy transfers atom pairs, similarly fluorescence resonance transfer (FRET) biological systems. Here we predict few-body FRET processes observe first three-body cold using caesium atoms. In these resonances, additional relay carry away an...
Registers of trapped neutral atoms, excited to Rydberg states induce strong long-distance interactions, are extensively studied for direct applications in quantum computing. Here we present a <a:math xmlns:a="http://www.w3.org/1998/Math/MathML"><a:mrow><a:mi>C</a:mi><a:mi>C</a:mi><a:mi mathvariant="normal">Φ</a:mi></a:mrow></a:math> phase gate protocol based on radio-frequency-induced Förster resonant interactions the array highly <c:math...
Three-body F\"orster resonances at long-range interactions of Rydberg atoms were first predicted and observed in Cs by Faoro et al. [Nat. Commun. 6, 8173 (2015)]. In these resonances, one the carries away an energy excess preventing two-body resonance, leading thus to a Borromean type transfer. But they fact as average signal for large number $N\ensuremath{\gg}1$. this Letter, we report on experimental observation three-body...
Measurements of high-lying even-parity $6sns\phantom{\rule{0.16em}{0ex}}{}^{1}{S}_{0}$ and $6snd\phantom{\rule{0.16em}{0ex}}{}^{1,3}{D}_{2}$ levels neutral $^{174}\mathrm{Yb}$ are presented in this paper. Spectroscopy is performed with a two-step laser excitation from the ground state $4{f}^{14}6{s}^{2}\phantom{\rule{0.16em}{0ex}}{}^{1}{S}_{0}$, Rydberg detected by using field ionization method. Additional two-photon microwave spectroscopy used to improve relative energy accuracy where...
New experimental quantum simulation platforms have recently been implemented with divalent atoms trapped in optical tweezer arrays promising performance. The second valence electron also brings new propects through the so-called Isolated Core Excitation (ICE), however autoionization presents a strong limitation to this use. In study, we propose and demonstrate approach applying sizable light shift Rydberg state close-to-resonant ICE while avoiding auto-ionization. particular, investigated of...
In our high-precision atom interferometer, the measured atomic phase shift is sensitive to rotations and accelerations of apparatus, also fluctuations Raman lasers. this paper we study two principal noise sources affecting shift, induced by optical vibrations setup. Phase reduced carrying out a lock lasers after amplification stages. We present new scheme reduce due using feed-forward on beams. With these methods, it should be possible reach range quantum projection limit, which about 1m rad...
We study isolated core excitation of ultra cold ytterbium Rydberg atoms high orbital quantum number. Measurements were performed on the $6s_{1/2} 40l \rightarrow 6p_{1/2} $ transition with $l=5-9$. The extracted energy shifts and autoionization rates are in good agreement a model based independant electrons, taking into account interactions perturbative approach. reveal particularly long persistence number, explained by strong coupling $6p_{1/2}nl$ autoionizing state $5d_{3/2}\epsilon l'$...
The $l$-mixing effect and state-transfer induced by an external electric field pulse in ultracold Rydberg gases are observed with cesium atoms excited to $\mathit{nS}$ states, measured a state selective ionization technique. High-$l$ states populated from the initially due non-adiabatic transitions through avoided crossings that formed between ($n\ensuremath{-}4$) manifold. population of product is investigated as function parameters. coherent property transfer demonstrated using 2-pulse...
The resonant energy transfer between two close particles, also known as Förster resonance in atomic or biological systems, is usually associated with dipole–dipole interaction. In Rydberg atoms, it a widely used tool to enhance the interactions particles. Here, we observe atoms that cannot be attributed interaction, owing selection rules, and comes instead from an efficient dipole–quadrupole process. We compare measured probability theoretical model including quadrupolar terms find very good...
We have observed recently the Stark-tuned three-body F\"orster resonances $3\ifmmode\times\else\texttimes\fi{}n{P}_{3/2}(|M|)\ensuremath{\rightarrow}n{S}_{1/2}+(n+1){S}_{1/2}+n{P}_{3/2}(|{M}^{*}|)$ at long-range interactions of a few cold Rb Rydberg atoms [D. B. Tretyakov et al., Phys. Rev. Lett. 119, 173402 (2017)]. The resonance appears different dc electric field with respect to ordinary two-body...