dorsal/arxiv
View SchemaNonlinear entanglement witnesses
| Authors | Otfried Gühne, Norbert Lütkenhaus |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0512164 |
| URL | https://arxiv.org/abs/quant-ph/0512164 |
| DOI | 10.1103/PhysRevLett.96.170502 |
| Journal | Phys. Rev. Lett. 96, 170502 (2006) |
Abstract
Entanglement detection typically relies on linear inequalities for mean values of certain observables (entanglement witnesses), where violation indicates entanglement. We provide a general method to improve any of these inequalities for bipartite systems via nonlinear expressions. The nonlinearities are of different orders and can be directly measured in experiments, often without any extra effort.
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"abstract": "Entanglement detection typically relies on linear inequalities for mean\nvalues of certain observables (entanglement witnesses), where violation\nindicates entanglement. We provide a general method to improve any of these\ninequalities for bipartite systems via nonlinear expressions. The\nnonlinearities are of different orders and can be directly measured in\nexperiments, often without any extra effort.",
"arxiv_id": "quant-ph/0512164",
"authors": [
"Otfried G\u00fchne",
"Norbert L\u00fctkenhaus"
],
"categories": [
"quant-ph"
],
"doi": "10.1103/PhysRevLett.96.170502",
"journal_ref": "Phys. Rev. Lett. 96, 170502 (2006)",
"title": "Nonlinear entanglement witnesses",
"url": "https://arxiv.org/abs/quant-ph/0512164"
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