dorsal/arxiv
View SchemaCovariant quantum measurements may not be optimal
| Authors | Asher Peres, Petra F. Scudo |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0107114 |
| URL | https://arxiv.org/abs/quant-ph/0107114 |
| DOI | 10.1080/09500340110118449 |
| Journal | J. Modern Optics 49 (2002) 1235 |
Abstract
Quantum particles, such as spins, can be used for communicating spatial directions to observers who share no common coordinate frame. We show that if the emitter's signals are the orbit of a group, then the optimal detection method may not be a covariant measurement (contrary to widespread belief). It may be advantageous for the receiver to use a different group and an indirect estimation method: first, an ordinary measurement supplies redundant numerical parameters; the latter are then used for a nonlinear optimal identification of the signal.
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"abstract": "Quantum particles, such as spins, can be used for communicating spatial\ndirections to observers who share no common coordinate frame. We show that if\nthe emitter\u0027s signals are the orbit of a group, then the optimal detection\nmethod may not be a covariant measurement (contrary to widespread belief). It\nmay be advantageous for the receiver to use a different group and an indirect\nestimation method: first, an ordinary measurement supplies redundant numerical\nparameters; the latter are then used for a nonlinear optimal identification of\nthe signal.",
"arxiv_id": "quant-ph/0107114",
"authors": [
"Asher Peres",
"Petra F. Scudo"
],
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"quant-ph"
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"doi": "10.1080/09500340110118449",
"journal_ref": "J. Modern Optics 49 (2002) 1235",
"title": "Covariant quantum measurements may not be optimal",
"url": "https://arxiv.org/abs/quant-ph/0107114"
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