dorsal/arxiv
View SchemaA subsystem-independent generalization of entanglement
| Authors | Howard Barnum, Emanuel Knill, Gerardo Ortiz, Rolando Somma, Lorenza Viola |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0305023 |
| URL | https://arxiv.org/abs/quant-ph/0305023 |
| DOI | 10.1103/PhysRevLett.92.107902 |
Abstract
We introduce a generalization of entanglement based on the idea that entanglement is relative to a distinguished subspace of observables rather than a distinguished subsystem decomposition. A pure quantum state is entangled relative to such a subspace if its expectations are a proper mixture of those of other states. Many information-theoretic aspects of entanglement can be extended to the general setting, suggesting new ways of measuring and classifying entanglement in multipartite systems. By going beyond the distinguishable-subsystem framework, generalized entanglement also provides novel tools for probing quantum correlations in interacting many-body systems.
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"abstract": "We introduce a generalization of entanglement based on the idea that\nentanglement is relative to a distinguished subspace of observables rather than\na distinguished subsystem decomposition. A pure quantum state is entangled\nrelative to such a subspace if its expectations are a proper mixture of those\nof other states. Many information-theoretic aspects of entanglement can be\nextended to the general setting, suggesting new ways of measuring and\nclassifying entanglement in multipartite systems. By going beyond the\ndistinguishable-subsystem framework, generalized entanglement also provides\nnovel tools for probing quantum correlations in interacting many-body systems.",
"arxiv_id": "quant-ph/0305023",
"authors": [
"Howard Barnum",
"Emanuel Knill",
"Gerardo Ortiz",
"Rolando Somma",
"Lorenza Viola"
],
"categories": [
"quant-ph",
"cond-mat"
],
"doi": "10.1103/PhysRevLett.92.107902",
"title": "A subsystem-independent generalization of entanglement",
"url": "https://arxiv.org/abs/quant-ph/0305023"
},
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