dorsal/arxiv
View SchemaHomodyne detection and optical parametric amplification: a classical approach applied to proposed "loophole-free" Bell tests
| Authors | Caroline H Thompson |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0512141 |
| URL | https://arxiv.org/abs/quant-ph/0512141 |
Abstract
Recent proposed ``loophole-free'' Bell tests are discussed in the light of classical models for the relevant features of optical parametric amplification and homodyne detection. The Bell tests themselves are uncontroversial: there are no obvious loopholes that might cause bias and hence, if the world does, after all, obey local realism, no violation of a Bell inequality will be observed. Interest centres around the question of whether or not the proposed criterion for ``non-classical'' light is valid. If it is not, then the experiments will fail in their initial concept, since both quantum theorists and local realists will agree that we are seeing a purely classical effect. The Bell test, though, is not the only criterion by which the quantum-mechanical and local realist models can be judged. It is suggested that the quantum-mechanical models given in the proposals will also fail in their detailed predictions. If the experiments are extended by including a range of parameter values and by analysing, in addition to the proposed digitised voltage differences, the raw voltages, the models can be compared in their overall performance and plausibility.
{
"annotation_id": "6b96bd1e-6ab5-4d63-b124-4b717fb1e98e",
"date_created": "2026-03-02T18:02:24.065000Z",
"date_modified": "2026-03-02T18:02:24.065000Z",
"file_hash": "4d3664d5f05a67fc536da80bdd1efbdeb87abb417af45f52b42ddf7886fad345",
"private": false,
"record": {
"abstract": "Recent proposed ``loophole-free\u0027\u0027 Bell tests are discussed in the light of\nclassical models for the relevant features of optical parametric amplification\nand homodyne detection. The Bell tests themselves are uncontroversial: there\nare no obvious loopholes that might cause bias and hence, if the world does,\nafter all, obey local realism, no violation of a Bell inequality will be\nobserved. Interest centres around the question of whether or not the proposed\ncriterion for ``non-classical\u0027\u0027 light is valid. If it is not, then the\nexperiments will fail in their initial concept, since both quantum theorists\nand local realists will agree that we are seeing a purely classical effect. The\nBell test, though, is not the only criterion by which the quantum-mechanical\nand local realist models can be judged. It is suggested that the\nquantum-mechanical models given in the proposals will also fail in their\ndetailed predictions. If the experiments are extended by including a range of\nparameter values and by analysing, in addition to the proposed digitised\nvoltage differences, the raw voltages, the models can be compared in their\noverall performance and plausibility.",
"arxiv_id": "quant-ph/0512141",
"authors": [
"Caroline H Thompson"
],
"categories": [
"quant-ph"
],
"title": "Homodyne detection and optical parametric amplification: a classical approach applied to proposed \"loophole-free\" Bell tests",
"url": "https://arxiv.org/abs/quant-ph/0512141"
},
"schema_id": "dorsal/arxiv",
"source": {
"execution_id": "3cc9e7a8-eead-4200-893b-76bd6d76748c",
"id": "arXiv Dataset IDs",
"type": "Model",
"variant": "snapshot-2026-03-01",
"version": "0.1.0"
},
"user_id": 1000002
}