dorsal/arxiv
View SchemaReconstructing the density matrix of a spin s through Stern-Gerlach measurements (II)
| Authors | Jean-Pierre Amiet, Stefan Weigert |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/9903067 |
| URL | https://arxiv.org/abs/quant-ph/9903067 |
| DOI | 10.1088/0305-4470/32/25/101 |
| Journal | J. Phys. A 32 (1999) L269 |
Abstract
The density matrix of a spin s is fixed uniquely if the probabilities to obtain the value s upon measuring n.S are known for 4s(s+1) appropriately chosen directions n in space. These numbers are just the expectation values of the density operator in coherent spin states, and they can be determined in an experiment carried out with a Stern-Gerlach apparatus. Furthermore, the experimental data can be inverted providing thus a parametrization of the statistical operator by 4s(s+1) positive parameters.
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"abstract": "The density matrix of a spin s is fixed uniquely if the probabilities to\nobtain the value s upon measuring n.S are known for 4s(s+1) appropriately\nchosen directions n in space. These numbers are just the expectation values of\nthe density operator in coherent spin states, and they can be determined in an\nexperiment carried out with a Stern-Gerlach apparatus. Furthermore, the\nexperimental data can be inverted providing thus a parametrization of the\nstatistical operator by 4s(s+1) positive parameters.",
"arxiv_id": "quant-ph/9903067",
"authors": [
"Jean-Pierre Amiet",
"Stefan Weigert"
],
"categories": [
"quant-ph"
],
"doi": "10.1088/0305-4470/32/25/101",
"journal_ref": "J. Phys. A 32 (1999) L269",
"title": "Reconstructing the density matrix of a spin s through Stern-Gerlach measurements (II)",
"url": "https://arxiv.org/abs/quant-ph/9903067"
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