dorsal/arxiv
View SchemaClassical and Quantum Analysis of One Dimensional Velocity Selection for Ultracold Atoms
| Authors | J. K. Fox, H. A. Kim, S. R. Mishra, S. H. Myrskog, A. M. Jofre, L. R. Segal, J. B. Kim, A. M. Steinberg |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0503028 |
| URL | https://arxiv.org/abs/quant-ph/0503028 |
| DOI | 10.1088/1464-4266/7/9/002 |
Abstract
We discuss a velocity selection technique for obtaining cold atoms, in which all atoms below a certain energy are spatially selected from the surrounding atom cloud. Velocity selection can in some cases be more efficient than other cooling techniques for the preparation of ultracold atom clouds in one dimension. With quantum mechanical and classical simulations and theory we present a scheme using a dipole force barrier to select the coldest atoms from a magnetically trapped atom cloud. The dipole and magnetic potentials create a local minimum which traps the coldest atoms. A unique advantage of this technique is the sharp cut-off in the velocity distribution of the sample of selected atoms. Such a non-thermal distribution should prove useful for a variety of experiments, including proposed studies of atomic tunneling and scattering from quantum potentials. We show that when the rms size of the atom cloud is smaller than the local minimum in which the selected atoms are trapped, the velocity selection technique can be more efficient in 1-D than some common techniques such as evaporative cooling. For example, one simulation shows nearly 6% of the atoms retained at a temperature 100 times lower than the starting condition.
{
"annotation_id": "475ce0e6-1759-4585-964f-cb770b1a756b",
"date_created": "2026-03-02T18:02:13.459000Z",
"date_modified": "2026-03-02T18:02:13.459000Z",
"file_hash": "86089e0cba8d64c8c351e8faca45a23f5335e6d3f8d2a46d356fc1dd8fa30e43",
"private": false,
"record": {
"abstract": "We discuss a velocity selection technique for obtaining cold atoms, in which\nall atoms below a certain energy are spatially selected from the surrounding\natom cloud. Velocity selection can in some cases be more efficient than other\ncooling techniques for the preparation of ultracold atom clouds in one\ndimension. With quantum mechanical and classical simulations and theory we\npresent a scheme using a dipole force barrier to select the coldest atoms from\na magnetically trapped atom cloud. The dipole and magnetic potentials create a\nlocal minimum which traps the coldest atoms. A unique advantage of this\ntechnique is the sharp cut-off in the velocity distribution of the sample of\nselected atoms. Such a non-thermal distribution should prove useful for a\nvariety of experiments, including proposed studies of atomic tunneling and\nscattering from quantum potentials. We show that when the rms size of the atom\ncloud is smaller than the local minimum in which the selected atoms are\ntrapped, the velocity selection technique can be more efficient in 1-D than\nsome common techniques such as evaporative cooling. For example, one simulation\nshows nearly 6% of the atoms retained at a temperature 100 times lower than the\nstarting condition.",
"arxiv_id": "quant-ph/0503028",
"authors": [
"J. K. Fox",
"H. A. Kim",
"S. R. Mishra",
"S. H. Myrskog",
"A. M. Jofre",
"L. R. Segal",
"J. B. Kim",
"A. M. Steinberg"
],
"categories": [
"quant-ph"
],
"doi": "10.1088/1464-4266/7/9/002",
"title": "Classical and Quantum Analysis of One Dimensional Velocity Selection for Ultracold Atoms",
"url": "https://arxiv.org/abs/quant-ph/0503028"
},
"schema_id": "dorsal/arxiv",
"source": {
"execution_id": "836da3dc-1b2e-4c8b-8f8e-066d5811ae5b",
"id": "arXiv Dataset IDs",
"type": "Model",
"variant": "snapshot-2026-03-01",
"version": "0.1.0"
},
"user_id": 1000002
}