dorsal/arxiv
View SchemaCalculations of collisions between cold alkaline earth atoms in a weak laser field
| Authors | M. Machholm, Paul S. Julienne, K. -A. Suominen |
|---|---|
| Categories | |
| ArXiv ID | physics/0103059 |
| URL | https://arxiv.org/abs/physics/0103059 |
| DOI | 10.1103/PhysRevA.64.033425 |
| Journal | Phys. Rev. A 64, 033425 (2001) |
Abstract
We calculate the light-induced collisional loss of laser-cooled and trapped magnesium atoms for detunings up to 50 atomic linewidths to the red of the ^1S_0-^1P_1 cooling transition. We evaluate loss rate coefficients due to both radiative and nonradiative state-changing mechanisms for temperatures at and below the Doppler cooling temperature. We solve the Schrodinger equation with a complex potential to represent spontaneous decay, but also give analytic models for various limits. Vibrational structure due to molecular photoassociation is present in the trap loss spectrum. Relatively broad structure due to absorption to the Mg_2 ^1Sigma_u state occurs for detunings larger than about 10 atomic linewidths. Much sharper structure, especially evident at low temperature, occurs even at smaller detunings due to of Mg_2 ^1Pi_g absorption, which is weakly allowed due to relativistic retardation corrections to the forbidden dipole transition strength. We also perform model studies for the other alkaline earth species Ca, Sr, and Ba and for Yb, and find similar qualitative behavior as for Mg.
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"abstract": "We calculate the light-induced collisional loss of laser-cooled and trapped\nmagnesium atoms for detunings up to 50 atomic linewidths to the red of the\n^1S_0-^1P_1 cooling transition. We evaluate loss rate coefficients due to both\nradiative and nonradiative state-changing mechanisms for temperatures at and\nbelow the Doppler cooling temperature. We solve the Schrodinger equation with a\ncomplex potential to represent spontaneous decay, but also give analytic models\nfor various limits. Vibrational structure due to molecular photoassociation is\npresent in the trap loss spectrum. Relatively broad structure due to absorption\nto the Mg_2 ^1Sigma_u state occurs for detunings larger than about 10 atomic\nlinewidths. Much sharper structure, especially evident at low temperature,\noccurs even at smaller detunings due to of Mg_2 ^1Pi_g absorption, which is\nweakly allowed due to relativistic retardation corrections to the forbidden\ndipole transition strength. We also perform model studies for the other\nalkaline earth species Ca, Sr, and Ba and for Yb, and find similar qualitative\nbehavior as for Mg.",
"arxiv_id": "physics/0103059",
"authors": [
"M. Machholm",
"Paul S. Julienne",
"K. -A. Suominen"
],
"categories": [
"physics.atom-ph"
],
"doi": "10.1103/PhysRevA.64.033425",
"journal_ref": "Phys. Rev. A 64, 033425 (2001)",
"title": "Calculations of collisions between cold alkaline earth atoms in a weak laser field",
"url": "https://arxiv.org/abs/physics/0103059"
},
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