dorsal/arxiv
View SchemaCommunication of Spin Directions with Product States and Finite Measurements
| Authors | E. Bagan, M. Baig, R. Munoz-Tapia |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0012045 |
| URL | https://arxiv.org/abs/quant-ph/0012045 |
| DOI | 10.1103/PhysRevA.64.022305 |
| Journal | Phys. Rev. A64, 022305 (2001) |
Abstract
Total spin eigenstates can be used to intrinsically encode a direction, which can later be decoded by means of a quantum measurement. We study the optimal strategy that can be adopted if, as is likely in practical applications, only product states of $N$-spins are available. We obtain the asymptotic behaviour of the average fidelity which provides a proof that the optimal states must be entangled. We also give a prescription for constructing finite measurements for general encoding eigenstates.
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"abstract": "Total spin eigenstates can be used to intrinsically encode a direction, which\ncan later be decoded by means of a quantum measurement. We study the optimal\nstrategy that can be adopted if, as is likely in practical applications, only\nproduct states of $N$-spins are available. We obtain the asymptotic behaviour\nof the average fidelity which provides a proof that the optimal states must be\nentangled. We also give a prescription for constructing finite measurements for\ngeneral encoding eigenstates.",
"arxiv_id": "quant-ph/0012045",
"authors": [
"E. Bagan",
"M. Baig",
"R. Munoz-Tapia"
],
"categories": [
"quant-ph"
],
"doi": "10.1103/PhysRevA.64.022305",
"journal_ref": "Phys. Rev. A64, 022305 (2001)",
"title": "Communication of Spin Directions with Product States and Finite Measurements",
"url": "https://arxiv.org/abs/quant-ph/0012045"
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