Berlin 2014 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 45: Ultracold atoms and molecules I

Q 45.6: Talk

Thursday, March 20, 2014, 15:15–15:30, DO26 208

En route to quantum many-body physics with ultracold polar molecules - 23Na40K Feshbach molecules and beyond. — •Nikolaus Buchheim, Zhenkai Lu, Tobias Schneider, Immanuel Bloch, and Christoph Gohle — Max-Planck-Institut für Quantenoptik, Garching, Germany

Ultra cold quantum gases with long-range dipolar interaction promise exciting new possibilities for quantum simulation of strongly interacting many-body systems. New classes of many-body phases (like super solids and stripe phases) are on the horizon and ferroelectric phases of highly polarizable systems are expected [1, 2].

The known route for creating polar molecules from laser-cooled alkaline atoms [3] involves the association of pairs of unbound atoms to weakly bound molecules (Feshbach molecules) using a magnetic field controlled Feshbach type scattering resonance. This is followed by a stimulated Raman adiabatic passage (STIRAP) to the rovibrational groundstate. We report on spectroscopic studies on a near-degenerate 23Na40K mixture along the lines of and expanding on [4].

[1] G. Pupillo et al. arXiv: 0805.1896 (2008).

[2] M. Iskin et al. Phys. Rev. Lett. 99, 110402 (2007).

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

[4] C.-H. Wu et al. Phys. Rev. Lett. 109, 085301 (2012).