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Dark resonances for ground-state transfer of molecular quantum gases

Dark resonances for ground-state transfer of molecular quantum gases,10.1007/s00340-009-3407-1,Applied Physics B-lasers and Optics,Manfred J. Mark,Joh

Dark resonances for ground-state transfer of molecular quantum gases   (Citations: 3)
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One possible way to produce ultra-cold, high-phase-space-density quantum gases of molecules in the rovibronic ground state is given by molecule association from quantum-degenerate atomic gases on a Feshbach resonance and subsequent coherent optical multi-photon transfer into the rovibronic ground state. In ultra-cold samples of Cs2 molecules, we observe two-photon dark resonances that connect the intermediate rovibrational level |v=73,J=2〉 with the rovibrational ground state |v=0,J=0〉 of the singlet X 1 Σ g + ground-state potential. For precise dark resonance spectroscopy we exploit the fact that it is possible to efficiently populate the level |v=73,J=2〉 by two-photon transfer from the dissociation threshold with the stimulated Raman adiabatic passage (STIRAP) technique. We find that at least one of the two-photon resonances is sufficiently strong to allow future implementation of coherent STIRAP transfer of a molecular quantum gas to the rovibrational ground state |v=0,J=0〉.
Journal: Applied Physics B-lasers and Optics - APPL PHYS B-LASERS OPT , vol. 95, no. 2, pp. 219-225, 2009
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