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 1S0 → 3P1 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.