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Q: Fachverband Quantenoptik und Photonik

Q 56: Poster III

Q 56.20: Poster

Thursday, March 21, 2013, 16:00–18:30, Empore Lichthof

Exploring Few-fermion Systems in a Tunable Potential — •Andrea Bergschneider, Vincent Klinkhamer, Simon Murmann, Gerhard Zürn, Thomas Lompe, and Selim Jochim — Physikalisches Institut der Universität Heidelberg

In the past two years we have built up an experimental setup to deterministically prepare small ensembles of ultracold fermions in a well-defined quantum state and use it to explore the physics of quasi-1D few-fermion systems [1, 2].

Here, we present a new setup featuring a high-resolution objective and a two-dimensional acousto-optic deflector. This upgrade gives us the capability to dynamically vary the shape of the trapping potential. We can change the aspect ratio of the confinement from quasi-1D or quasi-2D to 3D and hence continuously investigate the energetic shell structures in few-particle systems as a function of dimensionality and interaction strength. The new setup also allows the creation of multiple-well potentials and thus the investigation of few-site Hubbard physics as a bottom-up approach towards quantum magnetism.

[1] F. Serwane et al., Science 332 (336) (2011)

[2] G. Zürn et al., PRL 108, 075303 (2012)