A5011046779- Cold Atom Physics and Bose-Einstein Condensates
- Quantum, superfluid, helium dynamics
- Physics of Superconductivity and Magnetism
- Atomic and Subatomic Physics Research
- Quantum Information and Cryptography
- Spectroscopy and Laser Applications
- Strong Light-Matter Interactions
- Advanced Condensed Matter Physics
- Advanced Frequency and Time Standards
Austrian Academy of Sciences
2019-2024
University of Trento
2024
Universität Innsbruck
2019-2023
Institute for Quantum Optics and Quantum Information Innsbruck
2019-2023
Abstract The notion of quasi-particles is essential for understanding the behaviour complex many-body systems. A prototypical example a quasi-particle polaron, formed by an impurity strongly interacting with surrounding medium. Fermi polarons, created in sea, provide paradigmatic realization this concept. Importantly, such interact each other via modulation However, although quantum simulation experiments ultracold atoms have substantially improved our individual detection their interactions...
The authors experimentally prepare and investigate the properties of a strongly interacting imbalanced mixture bosonic 41K impurities immersed in Fermi sea ultracold 6Li atoms. Two configurations have been explored: thermal regime described by polaron picture partially Bose-Einstein-condensed coexisting Bose polarons.
We investigate the fundamental breathing mode of a small-sized elongated Bose-Einstein condensate coupled to large Fermi sea, which consists fully spin-polarized atoms in collisionless regime. Our observations show dramatic shift frequency when mixture undergoes phase separation at strong interspecies repulsion. find that maximum full phase-separation limit depends essentially on atom number ratio components. interpret experimental by modeling complex dynamics fermions within two...
The minimization of the magnetic field plays a crucial role in ultracold gas research. For instance, contact interaction dominates all other energy scales zero limit, giving rise to novel quantum phases matter. However, lowering fields well below mG level is often challenging experiments. In this article, we apply Landau-Zener spectroscopy characterize and reduce on an sodium atoms few tens {\mu}G. lowest achieved here opens observing matter with spinor Bose gases.
The combination of different kinds ultracold gases constitutes a novel powerful experimental framework for the investigation variety physical problems. We illustrate differences among possible quantum mixtures, be they homonuclear spin mixtures or heteronuclear ones, and show how can exploited to investigate plethora topics from few-body many-body regimes. In particular, we discuss under three perspectives: systems made few atoms kinds, single impurities immersed in host gas, two interacting...
The minimization of the magnetic field plays a crucial role in ultracold gas research. For instance, contact interaction dominates all other energy scales zero-magnetic-field limit, giving rise to novel quantum phases matter. However, lowering fields well below mG level is often challenging experiments. In this paper, we apply Landau-Zener spectroscopy characterize and reduce on an sodium atoms few tens $\textmu{}\mathrm{G}$. lowest achieved here opens way observing matter with spinor Bose gases.
We study the non-linear beam splitter in matter-wave interferometers using ultracold quantum gases a double-well configuration presence of non-local interactions inducing inter-well density-density coupling, as they can be realized, e.g., with dipolar gases. explore this effect after considering different input states, form either coherent, or Twin-Fock, NOON states. first review non-interacting limit and case which only local interaction is present, including sensitivity near self-trapping...
The notion of quasi-particles is essential for understanding the behaviour complex many-body systems. A prototypical example a quasi-particle, polaron, an impurity strongly interacting with surrounding medium. Fermi polarons, created in sea, provide paradigmatic realization this concept. As inherent and important property such interact each other via modulation While quantum simulation experiments ultracold atoms have significantly improved our individual detection their interactions has...
The topic of the present lecture notes are two-species quantum mixtures composed a deeply degenerate Fermi gas and second component, latter being fermionic or bosonic. A key ingredient is possibility to tune $s$-wave interaction between different species by means magnetically controlled Feshbach resonances, which allow us investigate regimes strong interactions. In two case studies, we review our experiments on $^6$Li fermions with $^{40}$K bosonic $^{41}$K atoms $^{161}$Dy atoms. We cover...
Abstract Ultracold gases provide an excellent platform for the realization of quantum interferometers. In case implementations based on Bose-Einstein condensates in double well potentials, effective two-mode model allows to study how interactions among particles affect sensitivity interferometer. this work we review properties such a and its application interferometric protocols, focusing achievable presence turned on. particular full sequence when initial state is Twin Fock state, which...