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Q: Fachverband Quantenoptik und Photonik
Q 21: Ultracold Atoms (Trapping and Cooling)
Q 21.1: Gruppenbericht
Dienstag, 10. März 2020, 14:00–14:30, f442
Ultracold atom-ion mixtures in optical light fields — •Pascal Weckesser1, Fabian Thielemann1, Daniel Hönig1, Julian Schmidt1,2, Kai Lok Lam1, Markus Debatin1,3, Leon Karpa1, and Tobias Schaetz1 — 1Albert-Ludwigs-Universität Freiburg, Germany — 2Laboratoire Kastler Brossel Paris, France — 3Universität Kassel, Germany
During the past decades ultracold atoms and ions have been two important pillars in atomic and molecular physics. Recently several groups have combined both systems trying to prepare the mixture at ultracold temperatures. Using optical dipole traps for ions [1] provides a new pathway to achieve these ultracold mixtures, as this approach overcomes the intrinsic micromotion heating effects of a conventional Paul trap [2], currently limiting most experiments.
In this talk, we present our experimental setup combining 138Ba+ ions with either 6Li or 87Rb atoms. For the former case we present first sympathetic cooling measurements within a Paul trap and discuss the micromotion induced limitation. For the latter case we show how this limitation can be overcome by transferring both atoms and ions in a combined optical dipole trap [3]. These new findings allow the investigation of new phenomena, such as atom-ion Feshbach resonances or the formation of new mesoscopic molecular states.
[1] A. Lambrecht et al., Nature Photonics 11.11 (2017): 704.
[2] M.Cetina et al., Phys.Rev.Lett. 109,253201 (2012)
[3] J. Schmidt et al., arXiv:1909.08352 (2019).