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NEWS

Dr. Alessio Ciamei

Van der Waals-Zeeman Institute, Institute of Physics, University of Amsterdam

Monday, July 11th, 2016 at 11:00:00 AM

Aula Querzoli - LENS

Published on-line at 08:45:36 AM on Monday, July 11th, 2016

Towards a quantum gas of RbSr ground-state molecules

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 onl

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 are currently exploring. We also present a scheme for the efficient and coherent creation of long-lived, ultracold Sr2 molecules, which exploits a light-shift compensation method.