A5084036480- Cold Atom Physics and Bose-Einstein Condensates
- Advanced Frequency and Time Standards
- Quantum, superfluid, helium dynamics
- Atomic and Subatomic Physics Research
- Quantum Information and Cryptography
- Physics of Superconductivity and Magnetism
- Quantum optics and atomic interactions
- Particle Detector Development and Performance
- Rare-earth and actinide compounds
- Spectral Theory in Mathematical Physics
- Quantum many-body systems
- Hemodynamic Monitoring and Therapy
- Geophysics and Sensor Technology
- Parallel Computing and Optimization Techniques
- Distributed and Parallel Computing Systems
- Nuclear physics research studies
- Theoretical and Computational Physics
Centre National de la Recherche Scientifique
2019-2021
Université de Bordeaux
2019-2021
Laboratoire Photonique, Numérique et Nanosciences
2019-2020
University of Southampton
2020
University of Florence
2012-2018
Austrian Academy of Sciences
2008-2011
Institute for Quantum Optics and Quantum Information Innsbruck
2008-2011
Universität Innsbruck
2009
Using a species-selective dipole potential, we create initially localized impurities and investigate their interactions with majority species of bosonic atoms in one-dimensional configuration during expansion. We find an interaction-dependent amplitude reduction the oscillation impurities' size no measurable frequency shift, study it as function interaction strength. discuss possible theoretical interpretations data. compare, particular, polaronic mass shift model derived following Feynman...
We report on the observation of Feshbach resonances in an ultracold mixture two fermionic species, $^{6}\mathrm{Li}$ and $^{40}\mathrm{K}$. The experimental data are interpreted using a simple asymptotic bound state model full coupled channels calculations. This unambiguously assigns observed terms various $s$- $p$-wave molecular states fully characterizes ground-state scattering properties any combination spin states.
We investigate the collisional stability of a sample $^{40}\mathrm{K}$ atoms immersed in tunable spin mixture $^{6}\mathrm{Li}$ atoms. In this three-component Fermi-Fermi mixture, we find very low loss rates wide range interactions as long molecule formation is avoided. The stable fermionic with two resonantly interacting states one species together another promising system for broad variety phenomena few- and many-body quantum physics.
We report on the expansion of a Fermi-Fermi mixture Li-6 and K-40 atoms under conditions strong interactions realized near center an interspecies Feshbach resonance. observe two different phenomena hydrodynamic behavior. The first one is well-known inversion aspect ratio. second collective expansion, where both species stick together despite their masses expand jointly. Our work constitutes step to explore intriguing many-body physics this novel system.
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...
Abstract Laser cooling based on dark states, i.e. states decoupled from light, has proven to be effective increase the phase-space density of cold trapped atoms. Dark-states requires open atomic transitions, in contrast ordinary laser used for example magneto-optical traps (MOTs), which operate closed transitions. For alkali atoms, dark-states is therefore commonly operated D 1 transition nS 1/2 → nP . We show that, 87 Rb, thanks large hyperfine structure separations use this not strictly...
We present the essential experimental steps of our all-optical approach to prepare a double-degenerate Fermi-Fermi mixture $^{6}\mathrm{Li}$ and $^{40}\mathrm{K}$ atoms, which then serves as starting point for molecule formation. first describe optimized trap loading procedures, internal-state preparation sample, combined evaporative sympathetic cooling process. discuss sample near an interspecies Feshbach resonance, we demonstrate formation heteronuclear molecules by magnetic field ramp...
Experiments in Atomic, Molecular, and Optical (AMO) physics require precise accurate control of digital, analog, radio frequency (RF) signals. We present hardware based on a field programmable gate array core that drives various modules via simple interface bus. The system supports an operating 10 MHz memory depth 8 M (223) instructions, both easily scalable. Successive experimental sequences can be stacked with no dead time synchronized external events at any instructions. Two or more units...
The authors demonstrate an efficient protocol relying on gray molasses to load rubidium atoms in a telecom optical trap. They further exploit the large AC Stark shift of excited level light assisted, high-speed cooling trap without atom loss.
We propose a method to exploit high-finesse optical resonators for light-assisted coherent manipulation of atomic ensembles, overcoming the limit imposed by finite response time cavity. The key element our scheme is rapidly switch interaction between atoms and cavity field with an auxiliary control process as, example, light shift induced beam. applicable other species, both in trapped free fall configurations, can be adopted internal and/or external degrees freedom. Our will open new...
Although quantum degenerate gases of neutral atoms have shown remarkable progress in the study many body physics, condensed matter precision measurements, and information processing, experimental is needed order to reach their full potential these fields. More complex spatial geometries as well novel methods for engineering interesting interactions are needed. Here we demonstrate a platform realization with wide range tune-ability experienced by possibility non-trivial long-range both within...
Ultracold Fermi-Fermi mixtures offer intriguing possibilities to study fermionic pairing phenomena and superfluidity in new regimes beyond the currently employed spin of a single species. We produce doubly-degenerate mixture <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">6</sup> Li xmlns:xlink="http://www.w3.org/1999/xlink">40</sup> K atoms by evaporative cooling an optical dipole trap. The trapping light is provided 100-W fiber laser operating...
Matter-wave interferometers are today at forefront of precision inertial measurements. They provide the best for precise monitoring gravity or tests general relativity. I present here some recent advances in these fields.