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Mainz 2017 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 53: Poster: Quantum Optics and Photonics III

Q 53.28: Poster

Thursday, March 9, 2017, 17:00–19:00, P OG2

Optical formation of weakly-bound, fermionic 87Rb87Sr molecules — •Alessio Ciamei, Vincent Barbé, Benjamin Pasquiou, and Florian Schreck — Institute of Physics, University of Amsterdam, Amsterdam, The Netherlands

We are pursuing the creation of ultracold RbSr ground-state molecules. In contrast to ultracold ground-state molecules created so far, RbSr molecules do not only have a large electric dipole moment (1.5 Debye), but also an unpaired electron. These properties give us a larger parameter space to tune interactions by applying electromagnetic fields, providing us with a path towards a quantum gas of ground-state molecules and quantum simulation. We present the creation of a 84Sr-87Rb Mott insulator, which is our starting point for molecule association using the Sr 1S03P1 transition. We find that only very weak optical transitions to molecular states exist in this isotopic mixture, hindering us from coherently creating molecules. Using mass-scaling, our spectroscopy data points to a promising molecule association path in the 87Sr-87Rb mixture, which we indeed were recently able to find experimentally. Finally, we present a scheme for the efficient and coherent creation of long-lived, ultracold Sr2 molecules, which exploits a light-shift compensation method. Together, our spectroscopy data for the 87Sr-87Rb mixture and our light-shift compensation technique, identify a path towards weakly-bound 87Rb87Sr molecules.

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