dorsal/arxiv
View SchemaThe quantum world is not built up from correlations
| Authors | Michael Seevinck |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0508175 |
| URL | https://arxiv.org/abs/quant-ph/0508175 |
| DOI | 10.1007/s10701-006-9073-9 |
| Journal | Foundations of Physics, vol. 36, 1573-1586 (2006) |
Abstract
It is known that the global state of a composite quantum system can be completely determined by specifying correlations between measurements performed on subsystems only. Despite the fact that the quantum correlations thus suffice to reconstruct the quantum state, we show, using a Bell inequality argument, that they cannot be regarded as objective local properties of the composite system in question. It is well known since the work of J.S. Bell, that one cannot have locally preexistent values for all physical quantities, whether they are deterministic or stochastic. The Bell inequality argument we present here shows this is also impossible for correlations among subsystems of an individual isolated composite system. Neither of them can be used to build up a world consisting of some local realistic structure. As a corrolary to the result we argue that entanglement cannot be considered ontologically robust. The argument has an important advantage over others because it does not need perfect correlations but only statistical correlations. It can therefore easily be tested in currently feasible experiments using four particle entanglement.
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"abstract": "It is known that the global state of a composite quantum system can be\ncompletely determined by specifying correlations between measurements performed\non subsystems only. Despite the fact that the quantum correlations thus suffice\nto reconstruct the quantum state, we show, using a Bell inequality argument,\nthat they cannot be regarded as objective local properties of the composite\nsystem in question. It is well known since the work of J.S. Bell, that one\ncannot have locally preexistent values for all physical quantities, whether\nthey are deterministic or stochastic. The Bell inequality argument we present\nhere shows this is also impossible for correlations among subsystems of an\nindividual isolated composite system. Neither of them can be used to build up a\nworld consisting of some local realistic structure. As a corrolary to the\nresult we argue that entanglement cannot be considered ontologically robust.\nThe argument has an important advantage over others because it does not need\nperfect correlations but only statistical correlations. It can therefore easily\nbe tested in currently feasible experiments using four particle entanglement.",
"arxiv_id": "quant-ph/0508175",
"authors": [
"Michael Seevinck"
],
"categories": [
"quant-ph"
],
"doi": "10.1007/s10701-006-9073-9",
"journal_ref": "Foundations of Physics, vol. 36, 1573-1586 (2006)",
"title": "The quantum world is not built up from correlations",
"url": "https://arxiv.org/abs/quant-ph/0508175"
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