dorsal/arxiv
View SchemaPhotoassociation of cold atoms with chirped laser pulses: time-dependent calculations and analysis of the adiabatic transfer within a two-state model
| Authors | E. Luc-Koenig, R. Kosloff, F. Masnou-Seeuws, M. Vatasescu |
|---|---|
| Categories | |
| ArXiv ID | physics/0404028 |
| URL | https://arxiv.org/abs/physics/0404028 |
| DOI | 10.1103/PhysRevA.70.033414 |
| Journal | Phys. Rev. A70 033414 (2004) |
Abstract
This theoretical paper presents numerical calculations for photoassociation of ultracold cesium atoms with a chirped laser pulse and detailed analysis of the results. In contrast with earlier work, the initial state is represented by a stationary continuum wavefunction. In the chosen example, it is shown that an important population transfer is achieved to $\approx 15$ vibrational levels in the vicinity of the v=98 bound level in the external well of the $0_g^-(6s+6p_{3/2})$ potential. Such levels lie in the energy range swept by the instantaneous frequency of the pulse, thus defining a ``photoassociation window''. Levels outside this window may be significantly excited during the pulse, but no population remains there after the pulse. Finally, the population transfer to the last vibrational levels of the ground $a^3\Sigma_u^+$(6s + 6s) is significant, making stable molecules. The results are interpreted in the framework of a two state model as an adiabatic inversion mechanism, efficient only within the photoassociation window. The large value found for the photoassociation rate suggests promising applications. The present chirp has been designed in view of creating a vibrational wavepacket in the excited state which is focussing at the barrier of the double well potential.
{
"annotation_id": "80ab644b-c2a2-4fc8-9336-8d8762d3a891",
"date_created": "2026-03-02T18:00:50.181000Z",
"date_modified": "2026-03-02T18:00:50.181000Z",
"file_hash": "e79f3c85125aa2989b2b25e04a80f1be379502a9e73e05dacdd284800d275d32",
"private": false,
"record": {
"abstract": "This theoretical paper presents numerical calculations for photoassociation\nof ultracold cesium atoms with a chirped laser pulse and detailed analysis of\nthe results. In contrast with earlier work, the initial state is represented by\na stationary continuum wavefunction. In the chosen example, it is shown that an\nimportant population transfer is achieved to $\\approx 15$ vibrational levels in\nthe vicinity of the v=98 bound level in the external well of the\n$0_g^-(6s+6p_{3/2})$ potential. Such levels lie in the energy range swept by\nthe instantaneous frequency of the pulse, thus defining a ``photoassociation\nwindow\u0027\u0027. Levels outside this window may be significantly excited during the\npulse, but no population remains there after the pulse. Finally, the population\ntransfer to the last vibrational levels of the ground $a^3\\Sigma_u^+$(6s + 6s)\nis significant, making stable molecules. The results are interpreted in the\nframework of a two state model as an adiabatic inversion mechanism, efficient\nonly within the photoassociation window. The large value found for the\nphotoassociation rate suggests promising applications. The present chirp has\nbeen designed in view of creating a vibrational wavepacket in the excited state\nwhich is focussing at the barrier of the double well potential.",
"arxiv_id": "physics/0404028",
"authors": [
"E. Luc-Koenig",
"R. Kosloff",
"F. Masnou-Seeuws",
"M. Vatasescu"
],
"categories": [
"physics.atm-clus",
"physics.atom-ph"
],
"doi": "10.1103/PhysRevA.70.033414",
"journal_ref": "Phys. Rev. A70 033414 (2004)",
"title": "Photoassociation of cold atoms with chirped laser pulses: time-dependent calculations and analysis of the adiabatic transfer within a two-state model",
"url": "https://arxiv.org/abs/physics/0404028"
},
"schema_id": "dorsal/arxiv",
"source": {
"execution_id": "476910e0-4989-42b2-a1a4-4cd93e50fedb",
"id": "arXiv Dataset IDs",
"type": "Model",
"variant": "snapshot-2026-03-01",
"version": "0.1.0"
},
"user_id": 1000002
}