dorsal/arxiv
View SchemaInfluence of a tight isotropic harmonic trap on photoassociation in ultracold homonuclear alkali gases
| Authors | Sergey Grishkevich, Alejandro Saenz |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0609150 |
| URL | https://arxiv.org/abs/quant-ph/0609150 |
| DOI | 10.1103/PhysRevA.76.022704 |
Abstract
The influence of a tight isotropic harmonic trap on photoassociation of two ultracold alkali atoms forming a homonuclear diatomic is investigated using realistic atomic interaction potentials. Confinement of the initial atom pair due to the trap leads to a uniform strong enhancement of the photoassociation rate to most, but also to a strongly suppressed rate for some final states. Thus tighter traps do not necessarily enhance the photoassociation rate. A further massive enhancement of the rate is found for strong interatomic interaction potentials. The details of this interaction play a minor role, except for large repulsive interactions for which a sharp window occurs in the photoassociation spectrum as is known from the trap-free case. A comparison with simplified models describing the atomic interaction like the pseudopotential approximation shows that they often provide reasonable estimates for the trap-induced enhancement of the photoassociation rate even if the predicted rates can be completely erroneous.
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"abstract": "The influence of a tight isotropic harmonic trap on photoassociation of two\nultracold alkali atoms forming a homonuclear diatomic is investigated using\nrealistic atomic interaction potentials. Confinement of the initial atom pair\ndue to the trap leads to a uniform strong enhancement of the photoassociation\nrate to most, but also to a strongly suppressed rate for some final states.\nThus tighter traps do not necessarily enhance the photoassociation rate. A\nfurther massive enhancement of the rate is found for strong interatomic\ninteraction potentials. The details of this interaction play a minor role,\nexcept for large repulsive interactions for which a sharp window occurs in the\nphotoassociation spectrum as is known from the trap-free case. A comparison\nwith simplified models describing the atomic interaction like the\npseudopotential approximation shows that they often provide reasonable\nestimates for the trap-induced enhancement of the photoassociation rate even if\nthe predicted rates can be completely erroneous.",
"arxiv_id": "quant-ph/0609150",
"authors": [
"Sergey Grishkevich",
"Alejandro Saenz"
],
"categories": [
"quant-ph"
],
"doi": "10.1103/PhysRevA.76.022704",
"title": "Influence of a tight isotropic harmonic trap on photoassociation in ultracold homonuclear alkali gases",
"url": "https://arxiv.org/abs/quant-ph/0609150"
},
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