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Coherently forming a single molecule in an optical trap

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Science  16 Oct 2020:
Vol. 370, Issue 6514, pp. 331-335
DOI: 10.1126/science.aba7468

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Non-Feshbach ultracold molecules

The formation of ultracold molecules has already had a profound impact on many research areas of physics. However, conventional methods of producing such molecules are attainable only for a limited number of systems or they suffer for strong dephasing. He et al. sought to pair atoms, through coupling of their spins, to the two-body relative motion mediated by the inherent polarization gradients in a strongly focused trapping laser. They report a successful assembly of an ultracold 87Rb-85Rb molecule in an optical tweezer and observed coherent, long-lived atom-molecule Rabi oscillations. They further demonstrate the full control of the internal and external degrees of freedom in the atom-molecule system.

Science, this issue p. 331

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