dorsal/arxiv
View SchemaSubsystem Purity as an Enforcer of Entanglement
| Authors | S. Bose, I. Fuentes-Guridi, P. L. Knight, V. Vedral |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0103063 |
| URL | https://arxiv.org/abs/quant-ph/0103063 |
| DOI | 10.1103/PhysRevLett.87.050401 |
| Journal | Phys. Rev. Lett. 87, 050401 (2001); Phys. Rev. Lett. 87, 279901 (2001) |
Abstract
We show that entanglement can always arise in the interaction of an arbitrarily large system in any mixed state with a single qubit in a pure state. This small initial purity is enough to enforce entanglement even when the total entropy is close to maximum. We demonstrate this feature using the Jaynes-Cummings interaction of a two level atom in a pure state with a field in a thermal state at an arbitrarily high temperature. We find the time and temperature variation of a lower bound on the amount of entanglement produced and study the classical correlations quantified by the mutual information.
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"abstract": "We show that entanglement can always arise in the interaction of an\narbitrarily large system in any mixed state with a single qubit in a pure\nstate. This small initial purity is enough to enforce entanglement even when\nthe total entropy is close to maximum. We demonstrate this feature using the\nJaynes-Cummings interaction of a two level atom in a pure state with a field in\na thermal state at an arbitrarily high temperature. We find the time and\ntemperature variation of a lower bound on the amount of entanglement produced\nand study the classical correlations quantified by the mutual information.",
"arxiv_id": "quant-ph/0103063",
"authors": [
"S. Bose",
"I. Fuentes-Guridi",
"P. L. Knight",
"V. Vedral"
],
"categories": [
"quant-ph"
],
"doi": "10.1103/PhysRevLett.87.050401",
"journal_ref": "Phys. Rev. Lett. 87, 050401 (2001); Phys. Rev. Lett. 87, 279901\n (2001)",
"title": "Subsystem Purity as an Enforcer of Entanglement",
"url": "https://arxiv.org/abs/quant-ph/0103063"
},
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