dorsal/arxiv
View SchemaEntanglement distribution revealed by macroscopic observations
| Authors | Johannes Kofler, Caslav Brukner |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0603208 |
| URL | https://arxiv.org/abs/quant-ph/0603208 |
| DOI | 10.1103/PhysRevA.74.050304 |
| Journal | Phys. Rev. A 74, 050304(R) (2006) |
Abstract
What can we learn about entanglement between individual particles in macroscopic samples by observing only the collective properties of the ensembles? Using only a few experimentally feasible collective properties, we establish an entanglement measure between two samples of spin-1/2 particles (as representatives of two-dimensional quantum systems). This is a tight lower bound for the average entanglement between all pairs of spins in general and is equal to the average entanglement for a certain class of systems. We compute the entanglement measures for explicit examples and show how to generalize the method to more than two samples and multi-partite entanglement.
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"abstract": "What can we learn about entanglement between individual particles in\nmacroscopic samples by observing only the collective properties of the\nensembles? Using only a few experimentally feasible collective properties, we\nestablish an entanglement measure between two samples of spin-1/2 particles (as\nrepresentatives of two-dimensional quantum systems). This is a tight lower\nbound for the average entanglement between all pairs of spins in general and is\nequal to the average entanglement for a certain class of systems. We compute\nthe entanglement measures for explicit examples and show how to generalize the\nmethod to more than two samples and multi-partite entanglement.",
"arxiv_id": "quant-ph/0603208",
"authors": [
"Johannes Kofler",
"Caslav Brukner"
],
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"quant-ph"
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"doi": "10.1103/PhysRevA.74.050304",
"journal_ref": "Phys. Rev. A 74, 050304(R) (2006)",
"title": "Entanglement distribution revealed by macroscopic observations",
"url": "https://arxiv.org/abs/quant-ph/0603208"
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