dorsal/arxiv
View SchemaThe efficiencies of generating cluster states with weak non-linearities
| Authors | Sebastien G. R. Louis, Kae Nemoto, W. J. Munro, T. P. Spiller |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0607060 |
| URL | https://arxiv.org/abs/quant-ph/0607060 |
| DOI | 10.1088/1367-2630/9/6/193 |
| Journal | New J. Phys. 9, 193 (2007) |
Abstract
We propose a scalable approach to building cluster states of matter qubits using coherent states of light. Recent work on the subject relies on the use of single photonic qubits in the measurement process. These schemes can be made robust to detector loss, spontaneous emission and cavity mismatching but as a consequence the overhead costs grow rapidly, in particular when considering single photon loss. In contrast, our approach uses continuous variables and highly efficient homodyne measurements. We present a two-qubit scheme, with a simple bucket measurement system yielding an entangling operation with success probability 1/2. Then we extend this to a three-qubit interaction, increasing this probability to 3/4. We discuss the important issues of the overhead cost and the time scaling. This leads to a "no-measurement" approach to building cluster states, making use of geometric phases in phase space.
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"abstract": "We propose a scalable approach to building cluster states of matter qubits\nusing coherent states of light. Recent work on the subject relies on the use of\nsingle photonic qubits in the measurement process. These schemes can be made\nrobust to detector loss, spontaneous emission and cavity mismatching but as a\nconsequence the overhead costs grow rapidly, in particular when considering\nsingle photon loss. In contrast, our approach uses continuous variables and\nhighly efficient homodyne measurements. We present a two-qubit scheme, with a\nsimple bucket measurement system yielding an entangling operation with success\nprobability 1/2. Then we extend this to a three-qubit interaction, increasing\nthis probability to 3/4. We discuss the important issues of the overhead cost\nand the time scaling. This leads to a \"no-measurement\" approach to building\ncluster states, making use of geometric phases in phase space.",
"arxiv_id": "quant-ph/0607060",
"authors": [
"Sebastien G. R. Louis",
"Kae Nemoto",
"W. J. Munro",
"T. P. Spiller"
],
"categories": [
"quant-ph"
],
"doi": "10.1088/1367-2630/9/6/193",
"journal_ref": "New J. Phys. 9, 193 (2007)",
"title": "The efficiencies of generating cluster states with weak non-linearities",
"url": "https://arxiv.org/abs/quant-ph/0607060"
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