dorsal/arxiv
View SchemaSeparable quantum states do not have stronger correlations than local realism. A comment on quant-ph/0611126 of Z. Chen
| Authors | M. Seevinck |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0701003 |
| URL | https://arxiv.org/abs/quant-ph/0701003 |
Abstract
Chen (quant-ph/0611126) has recently claimed ``exponential violation of local realism by separable states", in the sense that multi-partite separable quantum states are supposed to give rise to correlations and fluctuations that violate a Bell-type inequality that Chen takes to be satisfied by local realism. However, this can not be true since all predictions (including all correlations and fluctuations) that separable quantum states give rise to have a local realistic description and thus satisfy all Bell-type inequalities, and this holds for all number of parties. Since Chen claims otherwise by presenting a new inequality, claimed to be a Bell-type one, which separable states supposedly can violate, there must be a flaw in the argumentation. I will expose this flaw, not merely for clarification of this issue, but perhaps even more importantly since it re-teaches us an old lesson John Bell taught us over 40 years ago. I will argue that this lesson provides us with a new morale especially relevant to modern research in Bell-type inequalities.
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"abstract": "Chen (quant-ph/0611126) has recently claimed ``exponential violation of local\nrealism by separable states\", in the sense that multi-partite separable quantum\nstates are supposed to give rise to correlations and fluctuations that violate\na Bell-type inequality that Chen takes to be satisfied by local realism.\nHowever, this can not be true since all predictions (including all correlations\nand fluctuations) that separable quantum states give rise to have a local\nrealistic description and thus satisfy all Bell-type inequalities, and this\nholds for all number of parties. Since Chen claims otherwise by presenting a\nnew inequality, claimed to be a Bell-type one, which separable states\nsupposedly can violate, there must be a flaw in the argumentation. I will\nexpose this flaw, not merely for clarification of this issue, but perhaps even\nmore importantly since it re-teaches us an old lesson John Bell taught us over\n40 years ago. I will argue that this lesson provides us with a new morale\nespecially relevant to modern research in Bell-type inequalities.",
"arxiv_id": "quant-ph/0701003",
"authors": [
"M. Seevinck"
],
"categories": [
"quant-ph"
],
"title": "Separable quantum states do not have stronger correlations than local realism. A comment on quant-ph/0611126 of Z. Chen",
"url": "https://arxiv.org/abs/quant-ph/0701003"
},
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