Freiburg 2019 – wissenschaftliches Programm

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FM: Fall Meeting

FM 42: Poster: Quantum Computation

FM 42.8: Poster

Dienstag, 24. September 2019, 16:30–18:30, Tents

Investigating ultracold interactions between Ba+ ions and Li atoms — •Pascal Weckesser, Fabian Thielemann, Daniel Hoenig, Isabelle Lindemann, Florian Hasse, Leon Karpa, and Tobias Schaetz — Physikalisches Institut, Albert-Ludwigs-Universitaet, Germany

The interplay of ultracold atoms and ions has recently gained interest [1], due to its wide applications in quantum simulations of solid state systems [2] as well as in quantum computing [3]. In order to implement a reliable atom-ion platform, it is necessary to prepare the mixture at ultracold temperatures. Optical trapping of ions [4] provides a new pathway to achieve these ultracold atom-ion mixtures, as it overcomes the intrinsic micromotion heating effects of a conventional Paul trap [5].

In this poster we present our experimental hybrid-setup combining individual 138Ba+ ions in a linear Paul trap with 6Li atoms in a crossed optical dipole trap. First reaction measurements between the two constituents will be shown. We further analyse elastic collisions leading to possible cooling within the Paul trap and discuss its current limitations. In the future we want to overcome these limitations by confining both species in a combined optical dipole trap.

[1] A. Haerter et al., Cont. Phys., Vol. 55, issue 1, pages 33-45 .

[2] U. Bissbort et al., Phys.Rev.Lett. 111.8 (2013): 080501.

[3] Doerk et al., Phys. Rev. A 81.1 (2010): 012708.

[4] T. Schaetz, Journal of Physics B: 50.10 (2017): 102001.

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

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