Dresden 2011 – scientific programme

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A: Fachverband Atomphysik

A 26: Poster III

A 26.71: Poster

Thursday, March 17, 2011, 16:00–18:30, P2

Ultracold Fermi-Fermi Mixtures: The ⁶Li-⁴⁰K System — •Frederik Spiegelhalder, Antje Ludewig, Tobias Tiecke, and Jook Walraven — Van der Waals-Zeeman Instituut, Universiteit van Amsterdam, Netherlands

Fermi-Fermi systems, in particular ⁶Li-⁴⁰K, are currently studied in great detail both theoretically as well as experimentally. We now understand the basic scattering properties of the Li-K system. Several interspecies Feshbach resonances have been found and characterized [1, 2]. Heteronuclear molecules have been created at various resonances [3, 4]. Still many effects only observable in a mass-imbalanced system have not been experimentally achieved, yet. One significant difference to the single-species experiments is the possibility to apply species-specific optical trapping potentials [5]. Several theoretical proposals suggest that by confining one species using species-selective optical lattices, interesting new phases could be realized [7]. For example, a long-lived universal trimer state is expected to be observed in a mixed-dimensional system [6]. Here we present our recent experimental efforts towards realising a mixed-dimensional system.

[1] Wille et al. Phys. Rev. Lett. 100 (2008) 053201

[2] Tiecke et al. Phys. Rev. Lett. 104 (2010) 053202

[3] Spiegelhalder et al. Phys. Rev. A 81 (2010) 043637

[4] Voigt et al. Phys. Rev. Lett. 102 (2009) 020405

[5] LeBlanc and Thywissen. Phys. Rev. A 75 (2007) 053612

[6] Levinsen et al. Phys. Rev. Lett. 103 (2009) 153202

[7] Nishida and Tan. Phys. Rev. Lett. 101 (2008) 170401