79 citations · 538 across the 15 of their papers we have counts for
15 papers
Single-atom quantum probes for ultracold gases using nonequilibrium spin dynamics
Quentin Bouton, Jens Nettersheim, Daniel Adam +5
Quantum probes are atomic-sized devices mapping information of their environment to quantum mechanical states. By improving measurements and at the same time minimizing perturbatio…
Rotational cooling of molecules in a Bose-Einstein-Condensate
Martin Will, Tobias Lausch, Michael Fleischhauer
We discuss the rotational cooling of diatomic molecules in a Bose-Einstein condensate (BEC) of ultra-cold atoms by emission of phonons with orbital angular momentum. Despite the su…
Nonequilibrium thermodynamics and optimal cooling of a dilute atomic gas
Daniel Mayer, Felix Schmidt, Steve Haupt +5
Characterizing and optimizing thermodynamic processes far from equilibrium is a challenge. This is especially true for nanoscopic systems made of few particles. We here theoretical…
Tailored single-atom collisions at ultra-low energies
Felix Schmidt, Daniel Mayer, Quentin Bouton +5
We employ collisions of individual atomic cesium (Cs) impurities with an ultracold rubidium (Rb) gas to probe atomic interaction with hyperfine- and Zeeman-state sensitivity. Contr…
Controlled doping of a bosonic quantum gas with single neutral atoms
Daniel Mayer, Felix Schmidt, Daniel Adam +6
We report on the experimental doping of a Rubidium (Rb) Bose-Einstein condensate (BEC) with individual neutral Cesium (Cs) atoms. We discuss the experimental tools a…
Quantum spin dynamics of individual neutral impurities coupled to a Bose-Einstein condensate
Felix Schmidt, Daniel Mayer, Quentin Bouton +4
We report on spin dynamics of individual, localized neutral impurities immersed in a Bose-Einstein condensate. Single Cesium atoms are transported into a cloud of Rubidium atoms, t…
Role of thermal two-phonon scattering for impurity dynamics in a low-dimensional BEC
Tobias Lausch, Artur Widera, Michael Fleischhauer
We numerically study the relaxation dynamics of a single, heavy impurity atom interacting with a finite one- or two-dimensional, ultracold Bose-gas. While there is a clear separati…
Prethermalization in the cooling dynamics of an impurity in a BEC
Tobias Lausch, Artur Widera, Michael Fleischhauer
We discuss the cooling dynamics of heavy impurity atoms in a Bose-Einstein condensate (BEC) by emission of Cherenkov phonons from scattering with the condensate. In a weakly intera…
Extreme Event Statistics in a Drifting Markov Chain
Farina Kindermann, Michael Hohmann, Tobias Lausch +3
We analyse extreme event statistics of experimentally realized Markov chains with various drifts. Our Markov chains are individual trajectories of a single atom diffusing in a one…
Observation of individual tracer atoms in an ultracold dilute gas
Michael Hohmann, Farina Kindermann, Tobias Lausch +4
Understanding the motion of a tracer particle in a rarefied gas is of fundamental and practical importance. We report the experimental investigation of individual Cs atoms impingin…
Nonergodic Diffusion of Single Atoms in a Periodic Potential
Farina Kindermann, Andreas Dechant, Michael Hohmann +5
Diffusion is a central phenomenon in almost all fields of natural science revealing microscopic processes from the observation of macroscopic dynamics. Here, we consider the paradi…
A Single Atom Thermometer for Ultracold Gases
Michael Hohmann, Farina Kindermann, Tobias Lausch +3
We use single or few Cs atoms as thermometer for an ultracold, thermal Rb cloud. Observing the thermometer atoms' thermalization with the cold gas using spatially resolved fluoresc…
Optimizing Quantum Gas Production by an Evolutionary Algorithm
Tobias Lausch, Michael Hohmann, Farina Kindermann +3
We report on the application of an evolutionary algorithm (EA) to enhance performance of an ultra-cold quantum gas experiment. The production of a Rubidium Bose-Einstein con…
Precision Measurement of the 87-Rb Tune-Out Wavelength in the Hyperfine Ground State F=1 at 790 nm
Felix Schmidt, Daniel Mayer, Michael Hohmann +3
We report on a precision measurement of the line tune-out wavelength of Rubidium in the hyperfine ground state manifold at 790 nm, where the s…
Neutral Impurities in a Bose-Einstein Condensate for Simulation of the Fröhlich-Polaron
Michael Hohmann, Farina Kindermann, Benjamin Gänger +4
We present an experimental system to study the Bose polaron by immersion of single, well-controllable neutral Cs impurities into a Rb Bose-Einstein condensate (BEC). We show that,…