dorsal/arxiv
View SchemaOn the classical character of control fields in quantum information processing
| Authors | S. J. van Enk, H. J. Kimble |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0107088 |
| URL | https://arxiv.org/abs/quant-ph/0107088 |
| Journal | QIC 2, 1 (2002) |
Abstract
Control fields in quantum information processing are virtually always, almost by definition, assumed to be classical. In reality, however, when such a field is used to manipulate the quantum state of qubits, the qubits never remain completely unentangled with the field. For quantum information processing this is an undesirable property, as it precludes perfect quantum computing and quantum communication. Here we consider the interaction of atomic qubits with laser fields and quantify atom-field entanglement in various cases of interest. We find that the entanglement decreases with the average number of photons $\bar{n}$ in a laser beam as $E\propto\log_2 \bar{n}/\bar{n}$ for $\bar{n}\to\infty$.
{
"annotation_id": "1d69629b-6463-497e-9dda-568ff80df64d",
"date_created": "2026-03-02T18:01:46.078000Z",
"date_modified": "2026-03-02T18:01:46.078000Z",
"file_hash": "3b8d77bf20c192508531bc84c4e00bfbf3b95e1f5e1243dc98f67d289178b2f8",
"private": false,
"record": {
"abstract": "Control fields in quantum information processing are virtually always, almost\nby definition, assumed to be classical. In reality, however, when such a field\nis used to manipulate the quantum state of qubits, the qubits never remain\ncompletely unentangled with the field. For quantum information processing this\nis an undesirable property, as it precludes perfect quantum computing and\nquantum communication. Here we consider the interaction of atomic qubits with\nlaser fields and quantify atom-field entanglement in various cases of interest.\nWe find that the entanglement decreases with the average number of photons\n$\\bar{n}$ in a laser beam as $E\\propto\\log_2 \\bar{n}/\\bar{n}$ for\n$\\bar{n}\\to\\infty$.",
"arxiv_id": "quant-ph/0107088",
"authors": [
"S. J. van Enk",
"H. J. Kimble"
],
"categories": [
"quant-ph"
],
"journal_ref": "QIC 2, 1 (2002)",
"title": "On the classical character of control fields in quantum information processing",
"url": "https://arxiv.org/abs/quant-ph/0107088"
},
"schema_id": "dorsal/arxiv",
"source": {
"execution_id": "05c4b40b-e1e0-4926-b7db-2f70a08c3539",
"id": "arXiv Dataset IDs",
"type": "Model",
"variant": "snapshot-2026-03-01",
"version": "0.1.0"
},
"user_id": 1000002
}