Erlangen 2018 – scientific programme

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A: Fachverband Atomphysik

A 42: Poster Session IIIb

A 42.21: Poster

Thursday, March 8, 2018, 16:15–18:15, Zelt Ost

Towards Ultracold Interactions between Lithium and Barium in an Optical Trap — •Fabian Thielemann, Pascal Weckesser, Yannick Minet, Julian Schmidt, Leon Karpa, Markus Debatin, and Tobias Schaetz — Physikalisches Institut, Universität Freiburg, Hermann-Herder-Str. 3, 79104 Freiburg

The fields of ultracold atoms and trapped ions are important pillars of experimental quantum optics. Recently the expertise of both fields has been combined in hybrid trapping setups to prepare atom-ion mixtures at low temperatures. For joint systems features like Feshbach resonances at magnetic fields on the order of tens of Gauss or the formation of mesoscopic, weakly bound molecules have been predicted [1,2]. As reaching the ultracold regime in hybrid setups is an experimentally challenging task, this phenomena remain yet to be observed.

In our novel experimental setup we plan to reach the ultracold regime by sympathetically cooling Ba⁺ ions in a cloud of ⁶Li atoms. The atoms and ions will be confined in a combined optical dipole trap to overcome fundamental temperature limits imposed by micromotion of an ion in a radio frequency trap [3,4]. On this poster we will focus on the ⁶Li branch of the setup. We present characterising measurements of our magneto-optical trap. Further the current state of atom transfer to the dipole trap will be put forward.

[1] M. Tomza et al., Physical Review A 91.4 (2015): 042706.

[2] R.Cote et al. Phys.Rev.Lett. 89.093001 (2002).

[3] M. Cetina et al., Phys.Rev.Lett. 109,253201 (2012).

[4] A. Lambrecht et al., Nat. Phot. 11, 704-707 (2017)