Inelastic collisions of optically trapped metastable calcium atoms

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Erscheinungsjahr:
2013
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  • We study binary collisions of metastable calcium atoms (40Ca) in an optical dipole trap. Collisions between 3P0 atoms and between 3P0 and 1S0 atoms are considered. In the former case, the elastic and inelastic collision parameters are found to be 5.4×10-11 and 3.6×10-11cm3s-1, respectively. A fraction of the collisions between 3P0 atoms is found to produce cold trapped atoms in the singlet 1S0 state, suggesting that the internal energy for these collisions is dissipated by radiation. For collisions between 3P0 and 1S0 atoms, we find a two-body loss parameter of 8.5×10-11cm3s-1. Our observations show that metastable calcium samples in the 3P0 state are not stable at high densities, which limits their usefulness in quantum computing or many-body quantum simulation schemes. © 2013 American Physical Society.
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  • info:eu-repo/semantics/closedAccess
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Forschungsinformationssystem der UHH
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oai:www.edit.fis.uni-hamburg.de:publications/f9656adf-1aa9-4080-b51f-f5031711ca21