dorsal/arxiv
View SchemaStabilization of Ultracold Molecules Using Optimal Control Theory
| Authors | Christiane P. Koch, José P. Palao, Ronnie Kosloff, Françoise Masnou-Seeuws |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0402066 |
| URL | https://arxiv.org/abs/quant-ph/0402066 |
| DOI | 10.1103/PhysRevA.70.013402 |
| Journal | Phys. Rev. A 70, 013402 (2004) |
Abstract
In recent experiments on ultracold matter, molecules have been produced from ultracold atoms by photoassociation, Feshbach resonances, and three-body recombination. The created molecules are translationally cold, but vibrationally highly excited. This will eventually lead them to be lost from the trap due to collisions. We propose shaped laser pulses to transfer these highly excited molecules to their ground vibrational level. Optimal control theory is employed to find the light field that will carry out this task with minimum intensity. We present results for the sodium dimer. The final target can be reached to within 99% if the initial guess field is physically motivated. We find that the optimal fields contain the transition frequencies required by a good Franck-Condon pumping scheme. The analysis is able to identify the ranges of intensity and pulse duration which are able to achieve this task before other competing process take place. Such a scheme could produce stable ultracold molecular samples or even stable molecular Bose-Einstein condensates.
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"abstract": "In recent experiments on ultracold matter, molecules have been produced from\nultracold atoms by photoassociation, Feshbach resonances, and three-body\nrecombination. The created molecules are translationally cold, but\nvibrationally highly excited. This will eventually lead them to be lost from\nthe trap due to collisions. We propose shaped laser pulses to transfer these\nhighly excited molecules to their ground vibrational level. Optimal control\ntheory is employed to find the light field that will carry out this task with\nminimum intensity. We present results for the sodium dimer. The final target\ncan be reached to within 99% if the initial guess field is physically\nmotivated. We find that the optimal fields contain the transition frequencies\nrequired by a good Franck-Condon pumping scheme. The analysis is able to\nidentify the ranges of intensity and pulse duration which are able to achieve\nthis task before other competing process take place. Such a scheme could\nproduce stable ultracold molecular samples or even stable molecular\nBose-Einstein condensates.",
"arxiv_id": "quant-ph/0402066",
"authors": [
"Christiane P. Koch",
"Jos\u00e9 P. Palao",
"Ronnie Kosloff",
"Fran\u00e7oise Masnou-Seeuws"
],
"categories": [
"quant-ph"
],
"doi": "10.1103/PhysRevA.70.013402",
"journal_ref": "Phys. Rev. A 70, 013402 (2004)",
"title": "Stabilization of Ultracold Molecules Using Optimal Control Theory",
"url": "https://arxiv.org/abs/quant-ph/0402066"
},
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