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Two-photon photoassociation spectroscopy of the ς + 2 YbLi molecular ground state

Green, A
See Toh, JH
Roy, R
Li, M
Kotochigova, S
Gupta, S
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Pre-print
Date
2019-06-17
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DOI
10.1103/PhysRevA.99.063416
Abstract
© 2019 American Physical Society. We report on measurements of the binding energies of several weakly bound vibrational states of the paramagnetic Yb174Li6 molecule in the electronic ground state using two-photon spectroscopy in an ultracold atomic mixture confined in an optical dipole trap. We theoretically analyze the experimental spectrum to obtain an accurate description of the long-range potential of the ground-state molecule. Based on the measured binding energies, we arrive at an improved value of the interspecies s-wave scattering length as0=30a0. Employing coherent two-photon spectroscopy we also observe the creation of "dark" atom-molecule superposition states in the heteronuclear Yb-Li system. This paper is an important step towards the efficient production of ultracold YbLi molecules via association from an ultracold atomic mixture.
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Physical Review A
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