169 citations · 404 across the 10 of their papers we have counts for
10 papers
Indication of critical scaling in time during the relaxation of an open quantum system
Ling-Na Wu, Jens Nettersheim, Julian Feß +6
Phase transitions correspond to the singular behavior of physical systems in response to continuous control parameters like temperature or external fields. Near continuous phase tr…
Power of a quasi-spin quantum Otto engine at negative effective temperature
Jens Nettersheim, Sabrina Burgardt, Quentin Bouton +3
Heat engines usually operate by exchanging heat with thermal baths at different (positive) temperatures. Nonthermal baths may, however, lead to a significant performance boost. We…
Sensitivity of a collisional single-atom spin probe
Jens Nettersheim, Quentin Bouton, Daniel Adam +1
We study the sensitivity of a collisional single-atom probe for ultracold gases. Inelastic spin-exchange collisions map information about the gas temperature T or external magnetic…
Coherent and dephasing spectroscopy for single-impurity probing of an ultracold bath
Daniel Adam, Quentin Bouton, Jens Nettersheim +2
We report Ramsey spectroscopy on the clock states of individual Cs impurities immersed in an ultracold Rb bath. We record both the interaction-driven phase evolution and the decay…
An endoreversible quantum heat engine driven by atomic collisions
Quentin Bouton, Jens Nettersheim, Sabrina Burgardt +3
Quantum heat engines are subjected to quantum fluctuations related to their discrete energy spectra. Such fluctuations question the reliable operation of quantum engines in the mic…
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…
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…