dorsal/arxiv
View SchemaJoint measurements and Bell inequalities
| Authors | Wonmin Son, Erika Andersson, Stephem M. Barnett, M. S. Kim |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0509133 |
| URL | https://arxiv.org/abs/quant-ph/0509133 |
| DOI | 10.1103/PhysRevA.72.052116 |
| Journal | Phys. Rev. A 72, 052116 (2005) |
Abstract
Joint quantum measurements of non-commuting observables are possible, if one accepts an increase in the measured variances. A necessary condition for a joint measurement to be possible is that a joint probability distribution exists for the measurement. This fact suggests that there may be a link with Bell inequalities, as these will be satisfied if and only if a joint probability distribution for all involved observables exists. We investigate the connections between Bell inequalities and conditions for joint quantum measurements to be possible. Mermin's inequality for the three-particle Greenberger-Horne-Zeilinger state turns out to be equivalent to the condition for a joint measurement on two out of the three quantum systems to exist. Gisin's Bell inequality for three co-planar measurement directions, meanwhile, is shown to be less strict than the condition for the corresponding joint measurement.
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"abstract": "Joint quantum measurements of non-commuting observables are possible, if one\naccepts an increase in the measured variances. A necessary condition for a\njoint measurement to be possible is that a joint probability distribution\nexists for the measurement. This fact suggests that there may be a link with\nBell inequalities, as these will be satisfied if and only if a joint\nprobability distribution for all involved observables exists. We investigate\nthe connections between Bell inequalities and conditions for joint quantum\nmeasurements to be possible. Mermin\u0027s inequality for the three-particle\nGreenberger-Horne-Zeilinger state turns out to be equivalent to the condition\nfor a joint measurement on two out of the three quantum systems to exist.\nGisin\u0027s Bell inequality for three co-planar measurement directions, meanwhile,\nis shown to be less strict than the condition for the corresponding joint\nmeasurement.",
"arxiv_id": "quant-ph/0509133",
"authors": [
"Wonmin Son",
"Erika Andersson",
"Stephem M. Barnett",
"M. S. Kim"
],
"categories": [
"quant-ph"
],
"doi": "10.1103/PhysRevA.72.052116",
"journal_ref": "Phys. Rev. A 72, 052116 (2005)",
"title": "Joint measurements and Bell inequalities",
"url": "https://arxiv.org/abs/quant-ph/0509133"
},
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