dorsal/arxiv
View SchemaSuppression of inelastic collisions of polar $^1 \Sigma$ state molecules in an electrostatic field
| Authors | Alexander V. Avdeenkov, Masatoshi Kajita, John L. Bohn |
|---|---|
| Categories | |
| ArXiv ID | physics/0507077 |
| URL | https://arxiv.org/abs/physics/0507077 |
| DOI | 10.1103/PhysRevA.73.022707 |
Abstract
Collisions of polar $^{1}\Sigma$ state molecules at ultralow energies are considered, within a model that accounts for long-range dipole-dipole interactions, plus rotation of the molecules. We predict a substantial suppression of dipole-driven inelastic collisions at high values of the applied electric field, namely, field values of several times $B_e/\mu$. Here $B_e$ is the rotational constant, and $\mu$ is the electric dipole moment of molecules. The sudden large drop in the inelastic cross section is attributed to the onset of degeneracy between molecular rotational levels, which dramatically alters the scattering Hamiltonian. As a result of the large ratio of elastic to inelastic collision rates, we predict that evaporative cooling may be feasible for $^{1}\Sigma$ state molecules in weak-field-seeking states, provided a large bias electric field is present.
{
"annotation_id": "a282313e-23e8-4b08-b0f5-f820dc3dc543",
"date_created": "2026-03-02T18:01:00.458000Z",
"date_modified": "2026-03-02T18:01:00.458000Z",
"file_hash": "bec429114e64451443d2e379e85dbef503d48938c01886bfea49b1164966e22d",
"private": false,
"record": {
"abstract": "Collisions of polar $^{1}\\Sigma$ state molecules at ultralow energies are\nconsidered, within a model that accounts for long-range dipole-dipole\ninteractions, plus rotation of the molecules. We predict a substantial\nsuppression of dipole-driven inelastic collisions at high values of the applied\nelectric field, namely, field values of several times $B_e/\\mu$. Here $B_e$ is\nthe rotational constant, and $\\mu$ is the electric dipole moment of molecules.\n The sudden large drop in the inelastic cross section is attributed to the\nonset of degeneracy between molecular rotational levels, which dramatically\nalters the scattering Hamiltonian. As a result of the large ratio of elastic to\ninelastic collision rates, we predict that evaporative cooling may be feasible\nfor $^{1}\\Sigma$ state molecules in weak-field-seeking states, provided a large\nbias electric field is present.",
"arxiv_id": "physics/0507077",
"authors": [
"Alexander V. Avdeenkov",
"Masatoshi Kajita",
"John L. Bohn"
],
"categories": [
"physics.atom-ph"
],
"doi": "10.1103/PhysRevA.73.022707",
"title": "Suppression of inelastic collisions of polar $^1 \\Sigma$ state molecules in an electrostatic field",
"url": "https://arxiv.org/abs/physics/0507077"
},
"schema_id": "dorsal/arxiv",
"source": {
"execution_id": "6c32681c-974a-4f8c-b779-f51b2f5444b2",
"id": "arXiv Dataset IDs",
"type": "Model",
"variant": "snapshot-2026-03-01",
"version": "0.1.0"
},
"user_id": 1000002
}