Zobrazeno 1 - 10
of 59
pro vyhledávání: '"Johannes Hecker Denschlag"'
Autor:
Daniel K. Hoffmann, Vijay Pal Singh, Thomas Paintner, Manuel Jäger, Wolfgang Limmer, Ludwig Mathey, Johannes Hecker Denschlag
Publikováno v:
Nature Communications, Vol 12, Iss 1, Pp 1-6 (2021)
The second sound is an entropy oscillation propagating with constant pressure. Here the authors demonstrate the variation of the second sound wave in the crossover from the Bose-Einstein condensate to the Bardeen-Cooper-Schrieffer superfluid using 6L
Externí odkaz:
https://doaj.org/article/645c8fe7cb7e48cba748708864df539c
Autor:
Shinsuke Haze, José P. D'Incao, Dominik Dorer, Jinglun Li, Markus Deiß, Eberhard Tiemann, Paul S. Julienne, Johannes Hecker Denschlag
Publikováno v:
Physical Review Research, Vol 5, Iss 1, p 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:
https://doaj.org/article/9aa7eeea5a9b4309b20111a479c45348
Autor:
Daniel K. Hoffmann, Thomas Paintner, Wolfgang Limmer, Dmitry S. Petrov, Johannes Hecker Denschlag
Publikováno v:
Nature Communications, Vol 9, Iss 1, Pp 1-6 (2018)
Chemical few-body reactions at ultralow temperatures exhibit scaling laws which are directly linked to the nature of the involved particles and their interactions. Here, the authors investigate the kinetics of four-body collision processes where diat
Externí odkaz:
https://doaj.org/article/0c257f7225044018a6d0fe310969f531
Publikováno v:
Atoms, Vol 9, Iss 2, p 34 (2021)
We present a novel binding mechanism where a neutral Rydberg atom and an atomic ion form a molecular bound state at a large internuclear distance. The binding mechanism is based on Stark shifts and level crossings that are induced in the Rydberg atom
Externí odkaz:
https://doaj.org/article/ebbd9d368aac48b5ad6c7a6a8338674e
Publikováno v:
Nature Communications, Vol 8, Iss 1, Pp 1-7 (2017)
Investigating the collisional behaviour of molecules on the quantum level is the key in understanding and controlling chemical reactions. Here the authors measure inelastic collision rates for ultracold Rb2dimers in precisely defined quantum states a
Externí odkaz:
https://doaj.org/article/e2da6e068335495b98ba3df05303b4fc
Autor:
Amir Mohammadi, Artjom Krükow, Amir Mahdian, Markus Deiß, Jesús Pérez-Ríos, Humberto da Silva, Jr., Maurice Raoult, Olivier Dulieu, Johannes Hecker Denschlag
Publikováno v:
Physical Review Research, Vol 3, Iss 1, p 013196 (2021)
We study the evolution of a cold 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 thes
Externí odkaz:
https://doaj.org/article/a3c388d74b4146f1a688d32daf6f569f
Publikováno v:
New Journal of Physics, Vol 23, Iss 6, p 065008 (2021)
Collisions with cold particles can dissipate a hot particle’s energy and therefore can be exploited as a cooling mechanism. Kinetics teach us that cooling a particle down by several orders of magnitude typically takes many elastic collisions as eac
Externí odkaz:
https://doaj.org/article/d12f7b2af59245b4b59471b2625ffb86
Autor:
Markus Deiß, Shinsuke Haze, Joschka Wolf, Limei Wang, Florian Meinert, Christian Fey, Frederic Hummel, Peter Schmelcher, Johannes Hecker Denschlag
Publikováno v:
Physical Review Research, Vol 2, Iss 1, p 013047 (2020)
We present experimental evidence for spin-orbit interaction of an electron as it scatters from a neutral atom. The scattering process takes place within a Rb_{2} ultralong-range Rydberg molecule, consisting of a Rydberg atomic core, a Rydberg electro
Externí odkaz:
https://doaj.org/article/a8f41e9abf4641bda01e9868201f394b
Publikováno v:
New Journal of Physics, Vol 20, Iss 12, p 123015 (2018)
Ultracold ground-state molecules can be formed from ultracold atoms via photoassociation followed by a spontaneous emission process. Typically, the molecular products are distributed over a range of final states. Here, we propose to use an optical ca
Externí odkaz:
https://doaj.org/article/27efc8ac54e0407ca488da91acf975ac
Publikováno v:
New Journal of Physics, Vol 17, Iss 8, p 083032 (2015)
We study the combination of the hyperfine and Zeeman structure in the spin–orbit coupled ${A}^{1}{\Sigma }_{u}^{+}-{b}^{3}{\Pi }_{u}$ complex of ${}^{87}{\mathrm{Rb}}_{2}$ . For this purpose, absorption spectroscopy at a magnetic field around $B=10
Externí odkaz:
https://doaj.org/article/6ec8fb7cea3c4990beac181a05f4c45f