dorsal/arxiv
View SchemaSeparable approximation for mixed states of composite quantum systems
| Authors | Thomas Wellens, Marek Kus |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0104098 |
| URL | https://arxiv.org/abs/quant-ph/0104098 |
| DOI | 10.1103/PhysRevA.64.052302 |
Abstract
We describe a purely algebraic method for finding the best separable approximation to a mixed state of a composite 2x2 quantum system, consisting of a decomposition of the state into a linear combination of a mixed separable part and a pure entangled one. We prove that, in a generic case, the weight of the pure part in the decomposition equals the concurrence of the state.
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"abstract": "We describe a purely algebraic method for finding the best separable\napproximation to a mixed state of a composite 2x2 quantum system, consisting of\na decomposition of the state into a linear combination of a mixed separable\npart and a pure entangled one. We prove that, in a generic case, the weight of\nthe pure part in the decomposition equals the concurrence of the state.",
"arxiv_id": "quant-ph/0104098",
"authors": [
"Thomas Wellens",
"Marek Kus"
],
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"quant-ph"
],
"doi": "10.1103/PhysRevA.64.052302",
"title": "Separable approximation for mixed states of composite quantum systems",
"url": "https://arxiv.org/abs/quant-ph/0104098"
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