dorsal/arxiv
View SchemaQuantum limited velocity readout and quantum feedback cooling of a trapped ion via electromagnetically induced transparency
| Authors | Peter Rabl, Viktor Steixner, Peter Zoller |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0506185 |
| URL | https://arxiv.org/abs/quant-ph/0506185 |
| DOI | 10.1103/PhysRevA.72.043823 |
| Journal | Phys. Rev. A 72, 043823 (2005) |
Abstract
We discuss continuous observation of the momentum of a single atom by employing the high velocity sensitivity of the index of refraction in a driven $\Lambda$-system based on electromagnetically induced transparency (EIT). In the ideal limit of unit collection efficiency this provides a quantum limited measurement with minimal backaction on the atomic motion. A feedback loop, which drives the atom with a force proportional to measured signal, provides a cooling mechanism for the atomic motion. We derive the master equation which describes the feedback cooling and show that in the Lamb-Dicke limit the steady state energies are close to the ground state, limited only by the photon collection efficiency. Outside of the Lamb-Dicke regime the predicted temperatures are well below the Doppler limit.
{
"annotation_id": "870c270c-0822-4351-bc51-9c2f04d2dbfd",
"date_created": "2026-03-02T18:02:17.266000Z",
"date_modified": "2026-03-02T18:02:17.266000Z",
"file_hash": "7501b395665364026ef4ed3c9db9d4b399cfe65c8598eaa013044d8a72a28541",
"private": false,
"record": {
"abstract": "We discuss continuous observation of the momentum of a single atom by\nemploying the high velocity sensitivity of the index of refraction in a driven\n$\\Lambda$-system based on electromagnetically induced transparency (EIT). In\nthe ideal limit of unit collection efficiency this provides a quantum limited\nmeasurement with minimal backaction on the atomic motion. A feedback loop,\nwhich drives the atom with a force proportional to measured signal, provides a\ncooling mechanism for the atomic motion. We derive the master equation which\ndescribes the feedback cooling and show that in the Lamb-Dicke limit the steady\nstate energies are close to the ground state, limited only by the photon\ncollection efficiency. Outside of the Lamb-Dicke regime the predicted\ntemperatures are well below the Doppler limit.",
"arxiv_id": "quant-ph/0506185",
"authors": [
"Peter Rabl",
"Viktor Steixner",
"Peter Zoller"
],
"categories": [
"quant-ph"
],
"doi": "10.1103/PhysRevA.72.043823",
"journal_ref": "Phys. Rev. A 72, 043823 (2005)",
"title": "Quantum limited velocity readout and quantum feedback cooling of a trapped ion via electromagnetically induced transparency",
"url": "https://arxiv.org/abs/quant-ph/0506185"
},
"schema_id": "dorsal/arxiv",
"source": {
"execution_id": "03e07936-f731-4e54-9da4-8b8d4c934ebd",
"id": "arXiv Dataset IDs",
"type": "Model",
"variant": "snapshot-2026-03-01",
"version": "0.1.0"
},
"user_id": 1000002
}