Hannover 2010 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 24: Quantum Gases: Mixtures and Spinor Gases

Q 24.7: Vortrag

Mittwoch, 10. März 2010, 12:00–12:15, E 001

Towards the creation of a quantum gas of polar ground state molecules — •Markus Debatin1, Almar Lercher1, Bastian Schuster1, Raffael Rameshan1, David Baier1, Francesca Ferlaino1, Tetsu Takekoshi1, Rudolf Grimm1,2, and Hanns-Christoph Naegerl11Institut für Experimentalphysik Universität Innsbruck — 2Institut für Quantenoptik und Quanteninformation IQOQI Innsbruck

The creation of quantum gases of deeply-bound ground state molecules, c.f. Danzl et al.[1] and Ni et al. [2], has recently attracted a lot of attention. In our Rb-Cs mixture experiment the focus is on the creation of a bosonic quantum gas of polar ground state RbCs molecules using a stimulated adiabatic Raman transfer (STIRAP) scheme similar to that used in Ref. [1]. Our current goal is the creation of a dual-species BEC as a precursor to molecule production and STIRAP. We are able to create large all-optical BECs for Rb and Cs separately, but comparatively high 3-body interspecies loss rates present a challenge. In the talk, data on 3-body effects is presented and approaches to stabilize the mixture are discussed. After creating a high phase-space density mixture we will create Feshbach molecules and perform high-resolution molecular spectroscopy with the aim to develop a scheme for RbCs ground-state transfer.

[1] J.G. Danzl et al., Science 321, 1062 (2008),

[2] K.-K. Ni et al., Science 322, 231 (2008).

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