dorsal/arxiv
View SchemaEntanglement purification via separable superoperators
| Authors | Eric M. Rains |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/9707002 |
| URL | https://arxiv.org/abs/quant-ph/9707002 |
Abstract
One of the fundamental concepts of quantum information theory is that of entanglement purification; that is, the transformation of a partially entangled state into a smaller-dimensional, more completely entangled state. Of particular interest are protocols for entanglement purification (EPPs) that alternate purely local operations with one- or two-way classical communication. In the present work, we consider a more general, but simpler, class of transformations, called separable superoperators. Since every EPP is a separable superoperator, bounds on separable superoperators apply as well to EPPs; we use this fact to give a new upper bound on the rate of EPPs on Bell-diagonal states, and thus on the capacity of Bell-diagonal channels.
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"abstract": "One of the fundamental concepts of quantum information theory is that of\nentanglement purification; that is, the transformation of a partially entangled\nstate into a smaller-dimensional, more completely entangled state. Of\nparticular interest are protocols for entanglement purification (EPPs) that\nalternate purely local operations with one- or two-way classical communication.\nIn the present work, we consider a more general, but simpler, class of\ntransformations, called separable superoperators. Since every EPP is a\nseparable superoperator, bounds on separable superoperators apply as well to\nEPPs; we use this fact to give a new upper bound on the rate of EPPs on\nBell-diagonal states, and thus on the capacity of Bell-diagonal channels.",
"arxiv_id": "quant-ph/9707002",
"authors": [
"Eric M. Rains"
],
"categories": [
"quant-ph"
],
"title": "Entanglement purification via separable superoperators",
"url": "https://arxiv.org/abs/quant-ph/9707002"
},
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