dorsal/arxiv
View SchemaDynamics of quantum entanglement
| Authors | Karol Zyczkowski, Pawel Horodecki, Michal Horodecki, Ryszard Horodecki |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0008115 |
| URL | https://arxiv.org/abs/quant-ph/0008115 |
| DOI | 10.1103/PhysRevA.65.012101 |
| Journal | Phys. Rev. A, 65 012101 (2002) |
Abstract
A model of discrete dynamics of entanglement of bipartite quantum state is considered. It involves a global unitary dynamics of the system and periodic actions of local bistochastic or decaying channel. For initially pure states the decay of entanglement is accompanied with an increase of von Neumann entropy of the system. We observe and discuss revivals of entanglement due to unitary interaction of both subsystems. For some mixed states having different marginal entropies of both subsystems (one of them larger than the global entropy and the other one one smaller) we find an asymmetry in speed of entanglement decay. The entanglement of these states decreases faster, if the depolarizing channel acts on the "classical" subsystem, characterized by smaller marginal entropy.
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"abstract": "A model of discrete dynamics of entanglement of bipartite quantum state is\nconsidered. It involves a global unitary dynamics of the system and periodic\nactions of local bistochastic or decaying channel. For initially pure states\nthe decay of entanglement is accompanied with an increase of von Neumann\nentropy of the system. We observe and discuss revivals of entanglement due to\nunitary interaction of both subsystems. For some mixed states having different\nmarginal entropies of both subsystems (one of them larger than the global\nentropy and the other one one smaller) we find an asymmetry in speed of\nentanglement decay. The entanglement of these states decreases faster, if the\ndepolarizing channel acts on the \"classical\" subsystem, characterized by\nsmaller marginal entropy.",
"arxiv_id": "quant-ph/0008115",
"authors": [
"Karol Zyczkowski",
"Pawel Horodecki",
"Michal Horodecki",
"Ryszard Horodecki"
],
"categories": [
"quant-ph"
],
"doi": "10.1103/PhysRevA.65.012101",
"journal_ref": "Phys. Rev. A, 65 012101 (2002)",
"title": "Dynamics of quantum entanglement",
"url": "https://arxiv.org/abs/quant-ph/0008115"
},
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