Physics – Condensed Matter – Quantum Gases
Scientific paper
2009-11-16
Physics
Condensed Matter
Quantum Gases
7 pages, 5 figures, 68 references
Scientific paper
We consider two-color heteronuclear photoassociation of atoms into dipolar molecules in the J=1 electro-vibrational ground state, where a free-ground laser couples atoms directly to the ground state and a free-bound laser couples the atoms to an electronically-excited state. This problem raises an interest because heteronuclear photoassociation from atoms to near-ground state molecules is limited by the small size of the target state. Nevertheless, the addition of the excited state creates a second pathway for creating ground state molecules, leading to quantum interference between direct photoassociation and photoassociation via the excited molecular state, as well as a dispersive-like shift of the free-ground resonance position. Using LiNa as an example, these results are shown to depend on the detuning and intensity of the free-bound laser, as well as the semi-classical size of both molecular states. Despite strong enhancement, coherent conversion to the LiNa electro-vibrational ground state is possible only in a limited regime near the free-bound resonance.
DeBrosse Catherine
Mackie Matt
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