dorsal/arxiv
View SchemaEntanglement Swapping Chains for General Pure States
| Authors | Lucien Hardy, David D. Song |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0006132 |
| URL | https://arxiv.org/abs/quant-ph/0006132 |
| DOI | 10.1103/PhysRevA.62.052315 |
| Journal | Phys. Rev. A 62, 052315 (2000) |
Abstract
We consider entanglement swapping schemes with general (rather than maximally) entangled bipartite states of arbitary dimension shared pairwise between three or more parties in a chain. The intermediate parties perform generalised Bell measurements with the result that the two end parties end up sharing a entangled state which can be converted into maximally entangled states. We obtain an expression for the average amount of maximal entanglement concentrated in such a scheme and show that in a certain reasonably broad class of cases this scheme is provably optimal and that, in these cases, the amount of entanglement concentrated between the two ends is equal to that which could be concentrated from the weakest link in the chain.
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"abstract": "We consider entanglement swapping schemes with general (rather than\nmaximally) entangled bipartite states of arbitary dimension shared pairwise\nbetween three or more parties in a chain. The intermediate parties perform\ngeneralised Bell measurements with the result that the two end parties end up\nsharing a entangled state which can be converted into maximally entangled\nstates. We obtain an expression for the average amount of maximal entanglement\nconcentrated in such a scheme and show that in a certain reasonably broad class\nof cases this scheme is provably optimal and that, in these cases, the amount\nof entanglement concentrated between the two ends is equal to that which could\nbe concentrated from the weakest link in the chain.",
"arxiv_id": "quant-ph/0006132",
"authors": [
"Lucien Hardy",
"David D. Song"
],
"categories": [
"quant-ph"
],
"doi": "10.1103/PhysRevA.62.052315",
"journal_ref": "Phys. Rev. A 62, 052315 (2000)",
"title": "Entanglement Swapping Chains for General Pure States",
"url": "https://arxiv.org/abs/quant-ph/0006132"
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