Zobrazeno 1 - 10
of 114
pro vyhledávání: '"Denschlag, Johannes Hecker"'
Publikováno v:
Nat. Phys. (2024)
We review recent progress in the field of cold trapped molecular ions. A new generation of collision and cold chemistry experiments between atoms and ions has emerged, where cold atoms and ions are brought into contact in a controlled way in novel hy
Externí odkaz:
http://arxiv.org/abs/2311.12640
We study two-body correlations in a spin-balanced ultracold harmonically trapped Fermi gas of $^6$Li atoms in the crossover from the Bardeen-Cooper-Schrieffer (BCS) to the Bose-Einstein-Condensate (BEC) regime. For this, we precisely measure Tan's co
Externí odkaz:
http://arxiv.org/abs/2309.17305
Autor:
Kölle, Sebastian, Jäger, Manuel, Müller, Markus, Schoch, Wladimir, Limmer, Wolfgang, Denschlag, Johannes Hecker
Publikováno v:
Appl. Phys. B 129, 180 (2023)
We experimentally test a recently proposed holographic method for imaging coherent light scatterers which are distributed over a 2-dimensional grid. In our setup the scatterers consist of a back-illuminated, opaque mask with submicron-sized holes. We
Externí odkaz:
http://arxiv.org/abs/2305.13202
Autor:
Haze, Shinsuke, D'Incao, José P., Dorer, Dominik, Li, Jinglun, Deiß, Markus, Tiemann, Eberhard, Julienne, Paul S., Denschlag, Johannes Hecker
Publikováno v:
Phys. Rev. Research 5, 013161 (2023)
Three-body recombination is a chemical reaction where the collision of three atoms leads to the formation of a diatomic molecule. In the ultracold regime it is expected that the production rate of a molecule generally decreases with its binding energ
Externí odkaz:
http://arxiv.org/abs/2211.03834
Autor:
Haze, Shinsuke, D'Incao, José P., Dorer, Dominik, Deiß, Markus, Tiemann, Eberhard, Julienne, Paul S., Denschlag, Johannes Hecker
Publikováno v:
Phys. Rev. Lett. 128, 133401 (2022)
We explore the physical origin and the general validity of a propensity rule for the conservation of the hyperfine spin state in three-body recombination. This rule was recently discovered for the special case of $^{87}$Rb with its nearly equal singl
Externí odkaz:
http://arxiv.org/abs/2112.13714
Publikováno v:
Atoms 9(2), 34 (2021)
We present a novel binding mechanism where a neutral Rydberg atom and an atomic ion form a molecular bound state at large internuclear distance. The binding mechanism is based on Stark shifts and level crossings which are induced in the Rydberg atom
Externí odkaz:
http://arxiv.org/abs/2105.00845
We theoretically investigate the prospects for photoassociation (PA) of Rb$_3$, in particular at close range. We provide an overview of accessible states and possible transitions. The major focus is placed on the calculation of equilibrium structures
Externí odkaz:
http://arxiv.org/abs/2102.04779
Collisions with cold particles can dissipate the energy of a hot particle and therefore be exploited as a cooling mechanism. Kinetics teaches us that for a particle to be cooled down by several orders of magnitude, it will typically take many elastic
Externí odkaz:
http://arxiv.org/abs/2012.07759
Autor:
Mohammadi, Amir, Krükow, Artjom, Mahdian, Amir, Deiß, Markus, Pérez-Ríos, Jesús, Silva Jr., Humberto da, Raoult, Maurice, Dulieu, Olivier, Denschlag, Johannes Hecker
Publikováno v:
Phys. Rev. Research 3, 013196 (2021)
We study the evolution of a single BaRb$^+$ molecule while it continuously collides with ultracold Rb atoms. The initially weakly-bound molecule can undergo a sequence of elastic, inelastic, reactive, and radiative processes. We investigate these pro
Externí odkaz:
http://arxiv.org/abs/2005.09338
Autor:
Hoffmann, Daniel Kai, Singh, Vijay Pal, Paintner, Thomas, Jäger, Manuel, Limmer, Wolfgang, Mathey, Ludwig, Denschlag, Johannes Hecker
Second sound is an entropy wave which propagates in the superfluid component of a quantum liquid. Because it is an entropy wave, it probes the thermodynamic properties of the quantum liquid which are determined, e.g., by the interaction strength betw
Externí odkaz:
http://arxiv.org/abs/2003.06847