dorsal/arxiv
View SchemaHomodyne detection and parametric down-conversion: a classical approach applied to proposed "loophole-free" Bell tests
| Authors | Caroline H Thompson |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0508024 |
| URL | https://arxiv.org/abs/quant-ph/0508024 |
Abstract
A classical model is presented for the features of parametric down-conversion and homodyne detection relevant to recent proposed ``loophole-free'' Bell tests. 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 cit 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. 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.
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"date_created": "2026-03-02T18:02:20.426000Z",
"date_modified": "2026-03-02T18:02:20.426000Z",
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"abstract": "A classical model is presented for the features of parametric down-conversion\nand homodyne detection relevant to recent proposed ``loophole-free\u0027\u0027 Bell\ntests. The Bell tests themselves are uncontroversial: there are no obvious\nloopholes that might cause bias and hence, if the world does, after all, obey\nlocal realism, no violation of a Bell inequality will be observed. Interest\ncentres around the question of whether or not the proposed criterion for\n``non-classical\u0027\u0027 light is valid. If cit is not, then the experiments will fail\nin their initial concept, since both quantum theorists and local realists will\nagree that we are seeing a purely classical effect. The Bell test, though, is\nnot the only criterion by which the quantum-mechanical and local realist models\ncan be judged. 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/0508024",
"authors": [
"Caroline H Thompson"
],
"categories": [
"quant-ph"
],
"title": "Homodyne detection and parametric down-conversion: a classical approach applied to proposed \"loophole-free\" Bell tests",
"url": "https://arxiv.org/abs/quant-ph/0508024"
},
"schema_id": "dorsal/arxiv",
"source": {
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"type": "Model",
"variant": "snapshot-2026-03-01",
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