dorsal/arxiv
View SchemaCan measuring entanglement be easy?
| Authors | S. J. van Enk |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0606017 |
| URL | https://arxiv.org/abs/quant-ph/0606017 |
Abstract
I raise some doubts concerning a protocol recently applied in an experiment (Walborn et al, Nature) to measure entanglement. The protocol is much simpler than other known entanglement-verification methods, but, I argue, needs assumptions (namely that the state generated is known and pure) that are too strong to be allowed and that are not justified in most experiments. An extension of the protocol suggested in quant-ph/0605250 is much harder to implement and still relies on assumptions not justified in entanglement-verification protocols, as demonstrated by an explicit example.
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"abstract": "I raise some doubts concerning a protocol recently applied in an experiment\n(Walborn et al, Nature) to measure entanglement. The protocol is much simpler\nthan other known entanglement-verification methods, but, I argue, needs\nassumptions (namely that the state generated is known and pure) that are too\nstrong to be allowed and that are not justified in most experiments. An\nextension of the protocol suggested in quant-ph/0605250 is much harder to\nimplement and still relies on assumptions not justified in\nentanglement-verification protocols, as demonstrated by an explicit example.",
"arxiv_id": "quant-ph/0606017",
"authors": [
"S. J. van Enk"
],
"categories": [
"quant-ph"
],
"title": "Can measuring entanglement be easy?",
"url": "https://arxiv.org/abs/quant-ph/0606017"
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